972121404 has 48 divisors (see below), whose sum is σ = 2506146048. Its totient is φ = 291717888.

The previous prime is 972121349. The next prime is 972121411. The reversal of 972121404 is 404121279.

It is a super-2 number, since 2×972121404² = 1890040048229862432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98902 + ... + 108285.

It is an arithmetic number, because the mean of its divisors is an integer number (52211376).

Almost surely, 2^972121404 is an apocalyptic number.

It is an amenable number.

972121404 is an abundant number, since it is smaller than the sum of its proper divisors (1534024644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

972121404 is a wasteful number, since it uses less digits than its factorization.

972121404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207234 (or 207232 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 972121404 is about 31178.8614930052. The cubic root of 972121404 is about 990.6194144305.

It can be divided in two parts, 9721 and 21404, that added together give a triangular number (31125 = T₂₄₉).

The spelling of 972121404 in words is "nine hundred seventy-two million, one hundred twenty-one thousand, four hundred four".