122565887 has 2 divisors, whose sum is σ = 122565888. Its totient is φ = 122565886.

The previous prime is 122565881. The next prime is 122565901. The reversal of 122565887 is 788565221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122565887 - 2⁴ = 122565871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122565881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61282943 + 61282944.

It is an arithmetic number, because the mean of its divisors is an integer number (61282944).

Almost surely, 2^122565887 is an apocalyptic number.

122565887 is a deficient number, since it is larger than the sum of its proper divisors (1).

122565887 is an equidigital number, since it uses as much as digits as its factorization.

122565887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 268800, while the sum is 44.

The square root of 122565887 is about 11070.9478817308. The cubic root of 122565887 is about 496.7332187642.

The spelling of 122565887 in words is "one hundred twenty-two million, five hundred sixty-five thousand, eight hundred eighty-seven".