113525981 has 4 divisors (see below), whose sum is σ = 117440700. Its totient is φ = 109611264.

The previous prime is 113525921. The next prime is 113526001. The reversal of 113525981 is 189525311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28793956 + 84732025 = 5366^2 + 9205^2 .

It is a cyclic number.

It is not a de Polignac number, because 113525981 - 2¹⁴ = 113509597 is a prime.

It is a super-2 number, since 2×113525981² = 25776296724024722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113525911) 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 3 ways as a sum of consecutive naturals, for example, 1957316 + ... + 1957373.

It is an arithmetic number, because the mean of its divisors is an integer number (29360175).

Almost surely, 2^113525981 is an apocalyptic number.

It is an amenable number.

113525981 is a deficient number, since it is larger than the sum of its proper divisors (3914719).

113525981 is an equidigital number, since it uses as much as digits as its factorization.

113525981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3914718.

The product of its digits is 10800, while the sum is 35.

The square root of 113525981 is about 10654.8571553072. The cubic root of 113525981 is about 484.2077702889.

The spelling of 113525981 in words is "one hundred thirteen million, five hundred twenty-five thousand, nine hundred eighty-one".