122747621 has 4 divisors (see below), whose sum is σ = 124226592. Its totient is φ = 121268652.

The previous prime is 122747617. The next prime is 122747627. The reversal of 122747621 is 126747221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122747621 - 2² = 122747617 is a prime.

It is a super-2 number, since 2×122747621² = 30133956922319282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122747627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 739361 + ... + 739526.

It is an arithmetic number, because the mean of its divisors is an integer number (31056648).

Almost surely, 2^122747621 is an apocalyptic number.

It is an amenable number.

122747621 is a deficient number, since it is larger than the sum of its proper divisors (1478971).

122747621 is an equidigital number, since it uses as much as digits as its factorization.

122747621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478970.

The product of its digits is 9408, while the sum is 32.

The square root of 122747621 is about 11079.1525397929. The cubic root of 122747621 is about 496.9786071461.

The spelling of 122747621 in words is "one hundred twenty-two million, seven hundred forty-seven thousand, six hundred twenty-one".