115613261 has 4 divisors (see below), whose sum is σ = 117076800. Its totient is φ = 114149724.

The previous prime is 115613237. The next prime is 115613269. The reversal of 115613261 is 162316511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115613261 is a prime.

It is a super-2 number, since 2×115613261² = 26732852238108242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115613261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115613269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 731651 + ... + 731808.

It is an arithmetic number, because the mean of its divisors is an integer number (29269200).

Almost surely, 2^115613261 is an apocalyptic number.

It is an amenable number.

115613261 is a deficient number, since it is larger than the sum of its proper divisors (1463539).

115613261 is an equidigital number, since it uses as much as digits as its factorization.

115613261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463538.

The product of its digits is 1080, while the sum is 26.

The square root of 115613261 is about 10752.3607175355. The cubic root of 115613261 is about 487.1573025213.

Adding to 115613261 its reverse (162316511), we get a palindrome (277929772).

The spelling of 115613261 in words is "one hundred fifteen million, six hundred thirteen thousand, two hundred sixty-one".