122564881 has 2 divisors, whose sum is σ = 122564882. Its totient is φ = 122564880.

The previous prime is 122564873. The next prime is 122564903. The reversal of 122564881 is 188465221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105267600 + 17297281 = 10260^2 + 4159^2 .

It is a cyclic number.

It is not a de Polignac number, because 122564881 - 2³ = 122564873 is a prime.

It is a super-2 number, since 2×122564881² = 30044300109088322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 122564881.

It is not a weakly prime, because it can be changed into another prime (122564851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61282440 + 61282441.

It is an arithmetic number, because the mean of its divisors is an integer number (61282441).

Almost surely, 2^122564881 is an apocalyptic number.

It is an amenable number.

122564881 is a deficient number, since it is larger than the sum of its proper divisors (1).

122564881 is an equidigital number, since it uses as much as digits as its factorization.

122564881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 37.

The square root of 122564881 is about 11070.9024474069. The cubic root of 122564881 is about 496.7318597265.

The spelling of 122564881 in words is "one hundred twenty-two million, five hundred sixty-four thousand, eight hundred eighty-one".