115251661 has 16 divisors (see below), whose sum is σ = 135553536. Its totient is φ = 95942016.

The previous prime is 115251637. The next prime is 115251677. The reversal of 115251661 is 166152511.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 115251661 - 2²⁵ = 81697229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115251601) 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, 43795 + ... + 46351.

It is an arithmetic number, because the mean of its divisors is an integer number (8472096).

Almost surely, 2^115251661 is an apocalyptic number.

It is an amenable number.

115251661 is a deficient number, since it is larger than the sum of its proper divisors (20301875).

115251661 is a wasteful number, since it uses less digits than its factorization.

115251661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2748.

The product of its digits is 1800, while the sum is 28.

The square root of 115251661 is about 10735.5326369957. The cubic root of 115251661 is about 486.6488831829.

The spelling of 115251661 in words is "one hundred fifteen million, two hundred fifty-one thousand, six hundred sixty-one".