3122746921 has 24 divisors (see below), whose sum is σ = 3739006656. Its totient is φ = 2599359840.

The previous prime is 3122746897. The next prime is 3122746927. The reversal of 3122746921 is 1296472213.

It is a de Polignac number, because none of the positive numbers 2^k-3122746921 is a prime.

It is a super-2 number, since 2×3122746921² = 19503096665229960482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3122746927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 226395 + ... + 239791.

It is an arithmetic number, because the mean of its divisors is an integer number (155791944).

Almost surely, 2^3122746921 is an apocalyptic number.

It is an amenable number.

3122746921 is a deficient number, since it is larger than the sum of its proper divisors (616259735).

3122746921 is a wasteful number, since it uses less digits than its factorization.

3122746921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13549 (or 13542 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 3122746921 is about 55881.5436526229. The cubic root of 3122746921 is about 1461.6574223390.

The spelling of 3122746921 in words is "three billion, one hundred twenty-two million, seven hundred forty-six thousand, nine hundred twenty-one".