122561812 has 6 divisors (see below), whose sum is σ = 214483178. Its totient is φ = 61280904.

The previous prime is 122561809. The next prime is 122561839. The reversal of 122561812 is 218165221.

It can be written as a sum of positive squares in only one way, i.e., 121088016 + 1473796 = 11004^2 + 1214^2 .

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, 15320223 + ... + 15320230.

Almost surely, 2^122561812 is an apocalyptic number.

It is an amenable number.

122561812 is a deficient number, since it is larger than the sum of its proper divisors (91921366).

122561812 is a wasteful number, since it uses less digits than its factorization.

122561812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30640457 (or 30640455 counting only the distinct ones).

The product of its digits is 1920, while the sum is 28.

The square root of 122561812 is about 11070.7638399525. The cubic root of 122561812 is about 496.7277136699.

The spelling of 122561812 in words is "one hundred twenty-two million, five hundred sixty-one thousand, eight hundred twelve".