115025021 has 2 divisors, whose sum is σ = 115025022. Its totient is φ = 115025020.

The previous prime is 115025011. The next prime is 115025023. The reversal of 115025021 is 120520511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114789796 + 235225 = 10714^2 + 485^2 .

It is a cyclic number.

It is not a de Polignac number, because 115025021 - 2¹⁸ = 114762877 is a prime.

Together with 115025023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115025023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57512510 + 57512511.

It is an arithmetic number, because the mean of its divisors is an integer number (57512511).

Almost surely, 2^115025021 is an apocalyptic number.

It is an amenable number.

115025021 is a deficient number, since it is larger than the sum of its proper divisors (1).

115025021 is an equidigital number, since it uses as much as digits as its factorization.

115025021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 115025021 is about 10724.9718414549. The cubic root of 115025021 is about 486.3296788780.

Adding to 115025021 its reverse (120520511), we get a palindrome (235545532).

The spelling of 115025021 in words is "one hundred fifteen million, twenty-five thousand, twenty-one".