115401561 has 16 divisors (see below), whose sum is σ = 173273088. Its totient is φ = 67683600.

The previous prime is 115401547. The next prime is 115401571. The reversal of 115401561 is 165104511.

It is not a de Polignac number, because 115401561 - 2⁵ = 115401529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115401571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55381 + ... + 57426.

It is an arithmetic number, because the mean of its divisors is an integer number (10829568).

Almost surely, 2^115401561 is an apocalyptic number.

115401561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

115401561 is a deficient number, since it is larger than the sum of its proper divisors (57871527).

115401561 is a wasteful number, since it uses less digits than its factorization.

115401561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112852.

The product of its (nonzero) digits is 600, while the sum is 24.

The square root of 115401561 is about 10742.5118571031. The cubic root of 115401561 is about 486.8597754839.

The spelling of 115401561 in words is "one hundred fifteen million, four hundred one thousand, five hundred sixty-one".