122401556 has 6 divisors (see below), whose sum is σ = 214202730. Its totient is φ = 61200776.

The previous prime is 122401549. The next prime is 122401567. The reversal of 122401556 is 655104221.

It can be written as a sum of positive squares in only one way, i.e., 91776400 + 30625156 = 9580^2 + 5534^2 .

It is a super-2 number, since 2×122401556² = 29964281822442272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15300191 + ... + 15300198.

It is an arithmetic number, because the mean of its divisors is an integer number (35700455).

Almost surely, 2^122401556 is an apocalyptic number.

It is an amenable number.

122401556 is a deficient number, since it is larger than the sum of its proper divisors (91801174).

122401556 is a wasteful number, since it uses less digits than its factorization.

122401556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30600393 (or 30600391 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 122401556 is about 11063.5236701514. The cubic root of 122401556 is about 496.5111200570.

Adding to 122401556 its reverse (655104221), we get a palindrome (777505777).

The spelling of 122401556 in words is "one hundred twenty-two million, four hundred one thousand, five hundred fifty-six".