122815903 has 6 divisors (see below), whose sum is σ = 142867536. Its totient is φ = 105270732.

The previous prime is 122815897. The next prime is 122815909. The reversal of 122815903 is 309518221.

It is an interprime number because it is at equal distance from previous prime (122815897) and next prime (122815909).

It is not a de Polignac number, because 122815903 - 2¹⁷ = 122684831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122815909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1253175 + ... + 1253272.

It is an arithmetic number, because the mean of its divisors is an integer number (23811256).

Almost surely, 2^122815903 is an apocalyptic number.

122815903 is a deficient number, since it is larger than the sum of its proper divisors (20051633).

122815903 is an equidigital number, since it uses as much as digits as its factorization.

122815903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506461 (or 2506454 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 122815903 is about 11082.2336647447. The cubic root of 122815903 is about 497.0707430874.

The spelling of 122815903 in words is "one hundred twenty-two million, eight hundred fifteen thousand, nine hundred three".