1198542465 has 12 divisors (see below), whose sum is σ = 2077473684. Its totient is φ = 639222624.

The previous prime is 1198542451. The next prime is 1198542469. The reversal of 1198542465 is 5642458911.

1198542465 is a `hidden beast` number, since 11 + 98 + 542 + 4 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 143137296 + 1055405169 = 11964^2 + 32487^2 .

It is not a de Polignac number, because 1198542465 - 2⁷ = 1198542337 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 26634277 = 1198542465 / (1 + 1 + 9 + 8 + 5 + 4 + 2 + 4 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1198542465.

It is not an unprimeable number, because it can be changed into a prime (1198542469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13317094 + ... + 13317183.

It is an arithmetic number, because the mean of its divisors is an integer number (173122807).

Almost surely, 2^1198542465 is an apocalyptic number.

1198542465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1198542465 is a deficient number, since it is larger than the sum of its proper divisors (878931219).

1198542465 is a wasteful number, since it uses less digits than its factorization.

1198542465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26634288 (or 26634285 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 1198542465 is about 34619.9720537149. The cubic root of 1198542465 is about 1062.2281554131.

The spelling of 1198542465 in words is "one billion, one hundred ninety-eight million, five hundred forty-two thousand, four hundred sixty-five".