115145091 has 8 divisors (see below), whose sum is σ = 170585360. Its totient is φ = 76763376.

The previous prime is 115145087. The next prime is 115145113. The reversal of 115145091 is 190541511.

115145091 is a `hidden beast` number, since 1 + 151 + 4 + 509 + 1 = 666.

It is not a de Polignac number, because 115145091 - 2² = 115145087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4264633 = 115145091 / (1 + 1 + 5 + 1 + 4 + 5 + 0 + 9 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115145011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2132290 + ... + 2132343.

It is an arithmetic number, because the mean of its divisors is an integer number (21323170).

Almost surely, 2^115145091 is an apocalyptic number.

115145091 is a deficient number, since it is larger than the sum of its proper divisors (55440269).

115145091 is an equidigital number, since it uses as much as digits as its factorization.

115145091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4264642 (or 4264636 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

The square root of 115145091 is about 10730.5680651119. The cubic root of 115145091 is about 486.4988400384.

The spelling of 115145091 in words is "one hundred fifteen million, one hundred forty-five thousand, ninety-one".