115450781 has 4 divisors (see below), whose sum is σ = 116159232. Its totient is φ = 114742332.

The previous prime is 115450771. The next prime is 115450799. The reversal of 115450781 is 187054511.

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-115450781 is a prime.

It is a super-2 number, since 2×115450781² = 26657765667019922, 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 (115450721) 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, 353981 + ... + 354306.

It is an arithmetic number, because the mean of its divisors is an integer number (29039808).

Almost surely, 2^115450781 is an apocalyptic number.

It is an amenable number.

115450781 is a deficient number, since it is larger than the sum of its proper divisors (708451).

115450781 is an equidigital number, since it uses as much as digits as its factorization.

115450781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708450.

The product of its (nonzero) digits is 5600, while the sum is 32.

The square root of 115450781 is about 10744.8025109818. The cubic root of 115450781 is about 486.9289826127.

The spelling of 115450781 in words is "one hundred fifteen million, four hundred fifty thousand, seven hundred eighty-one".