1198553451 has 16 divisors (see below), whose sum is σ = 1641669120. Its totient is φ = 777346880.

The previous prime is 1198553443. The next prime is 1198553471. The reversal of 1198553451 is 1543558911.

It is not a de Polignac number, because 1198553451 - 2³ = 1198553443 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1198553401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30586 + ... + 57728.

It is an arithmetic number, because the mean of its divisors is an integer number (102604320).

Almost surely, 2^1198553451 is an apocalyptic number.

1198553451 is a deficient number, since it is larger than the sum of its proper divisors (443115669).

1198553451 is a wasteful number, since it uses less digits than its factorization.

1198553451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27546.

The product of its digits is 108000, while the sum is 42.

The square root of 1198553451 is about 34620.1307189906. The cubic root of 1198553451 is about 1062.2314009115.

The spelling of 1198553451 in words is "one billion, one hundred ninety-eight million, five hundred fifty-three thousand, four hundred fifty-one".