972621 has 32 divisors (see below), whose sum is σ = 1653120. Its totient is φ = 559872.

The previous prime is 972613. The next prime is 972623. The reversal of 972621 is 126279.

It is not a de Polignac number, because 972621 - 2³ = 972613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (972623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5886 + ... + 6048.

It is an arithmetic number, because the mean of its divisors is an integer number (51660).

2⁹⁷²⁶²¹ is an apocalyptic number.

It is an amenable number.

972621 is a deficient number, since it is larger than the sum of its proper divisors (680499).

972621 is a wasteful number, since it uses less digits than its factorization.

972621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 196 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 972621 is about 986.2154936929. The cubic root of 972621 is about 99.0789086222.

The spelling of 972621 in words is "nine hundred seventy-two thousand, six hundred twenty-one".