115390945 has 4 divisors (see below), whose sum is σ = 138469140. Its totient is φ = 92312752.

The previous prime is 115390943. The next prime is 115390981. The reversal of 115390945 is 549093511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 549093511 = 29 ⋅18934259.

It can be written as a sum of positive squares in 2 ways, for example, as 72658576 + 42732369 = 8524^2 + 6537^2 .

It is a cyclic number.

It is not a de Polignac number, because 115390945 - 2¹ = 115390943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115390943) 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, 11539090 + ... + 11539099.

It is an arithmetic number, because the mean of its divisors is an integer number (34617285).

Almost surely, 2^115390945 is an apocalyptic number.

It is an amenable number.

115390945 is a deficient number, since it is larger than the sum of its proper divisors (23078195).

115390945 is an equidigital number, since it uses as much as digits as its factorization.

115390945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23078194.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 115390945 is about 10742.0177341131. The cubic root of 115390945 is about 486.8448459866.

It can be divided in two parts, 11 and 5390945, that multiplied together give a palindrome (59300395).

The spelling of 115390945 in words is "one hundred fifteen million, three hundred ninety thousand, nine hundred forty-five".