1198408725 has 36 divisors (see below), whose sum is σ = 2204511556. Its totient is φ = 621872640.

The previous prime is 1198408691. The next prime is 1198408747. The reversal of 1198408725 is 5278048911.

It can be written as a sum of positive squares in 6 ways, for example, as 62583921 + 1135824804 = 7911^2 + 33702^2 .

It is not a de Polignac number, because 1198408725 - 2⁹ = 1198408213 is a prime.

It is a super-2 number, since 2×1198408725² = 2872366944312251250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 63652 + ... + 80301.

Almost surely, 2^1198408725 is an apocalyptic number.

1198408725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1198408725 is a deficient number, since it is larger than the sum of its proper divisors (1006102831).

1198408725 is a wasteful number, since it uses less digits than its factorization.

1198408725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144006 (or 143998 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 1198408725 is about 34618.0404558086. The cubic root of 1198408725 is about 1062.1886441784.

The spelling of 1198408725 in words is "one billion, one hundred ninety-eight million, four hundred eight thousand, seven hundred twenty-five".