1183985725 has 12 divisors (see below), whose sum is σ = 1581076756. Its totient is φ = 874327680.

The previous prime is 1183985701. The next prime is 1183985749. The reversal of 1183985725 is 5275893811.

It is an interprime number because it is at equal distance from previous prime (1183985701) and next prime (1183985749).

It can be written as a sum of positive squares in 6 ways, for example, as 13935289 + 1170050436 = 3733^2 + 34206^2 .

It is not a de Polignac number, because 1183985725 - 2⁷ = 1183985597 is a prime.

It is a super-3 number, since 3×1183985725³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 1821192 + ... + 1821841.

Almost surely, 2^1183985725 is an apocalyptic number.

It is an amenable number.

1183985725 is a deficient number, since it is larger than the sum of its proper divisors (397091031).

1183985725 is a wasteful number, since it uses less digits than its factorization.

1183985725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3643056 (or 3643051 counting only the distinct ones).

The product of its digits is 604800, while the sum is 49.

The square root of 1183985725 is about 34409.0936381649. The cubic root of 1183985725 is about 1057.9102429087.

The spelling of 1183985725 in words is "one billion, one hundred eighty-three million, nine hundred eighty-five thousand, seven hundred twenty-five".