122368581 has 12 divisors (see below), whose sum is σ = 176954700. Its totient is φ = 81486720.

The previous prime is 122368577. The next prime is 122368619. The reversal of 122368581 is 185863221.

It is a happy number.

122368581 is a `hidden beast` number, since 12 + 2 + 3 + 68 + 581 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 104652900 + 17715681 = 10230^2 + 4209^2 .

It is not a de Polignac number, because 122368581 - 2² = 122368577 is a prime.

It is a super-2 number, since 2×122368581² = 29948139231907122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122364581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1245 + ... + 15693.

It is an arithmetic number, because the mean of its divisors is an integer number (14746225).

Almost surely, 2^122368581 is an apocalyptic number.

It is an amenable number.

122368581 is a deficient number, since it is larger than the sum of its proper divisors (54586119).

122368581 is a wasteful number, since it uses less digits than its factorization.

122368581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15396 (or 15393 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 122368581 is about 11062.0333121899. The cubic root of 122368581 is about 496.4665293258.

The spelling of 122368581 in words is "one hundred twenty-two million, three hundred sixty-eight thousand, five hundred eighty-one".