872277021 has 144 divisors (see below), whose sum is σ = 1720922112. Its totient is φ = 415134720.

The previous prime is 872277013. The next prime is 872277037. The reversal of 872277021 is 120772278.

It is not a de Polignac number, because 872277021 - 2³ = 872277013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872277041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 6868260 + ... + 6868386.

It is an arithmetic number, because the mean of its divisors is an integer number (11950848).

Almost surely, 2^872277021 is an apocalyptic number.

It is an amenable number.

872277021 is a deficient number, since it is larger than the sum of its proper divisors (848645091).

872277021 is a wasteful number, since it uses less digits than its factorization.

872277021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 872277021 is about 29534.3363053921. The cubic root of 872277021 is about 955.4723944158.

The spelling of 872277021 in words is "eight hundred seventy-two million, two hundred seventy-seven thousand, twenty-one".