821372 has 24 divisors (see below), whose sum is σ = 1560384. Its totient is φ = 376832.

The previous prime is 821333. The next prime is 821377. The reversal of 821372 is 273128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3068 + ... + 3324.

It is an arithmetic number, because the mean of its divisors is an integer number (65016).

2⁸²¹³⁷² is an apocalyptic number.

It is an amenable number.

821372 is a deficient number, since it is larger than the sum of its proper divisors (739012).

821372 is a wasteful number, since it uses less digits than its factorization.

821372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325 (or 323 counting only the distinct ones).

The product of its digits is 672, while the sum is 23.

The square root of 821372 is about 906.2957574655. The cubic root of 821372 is about 93.6511895221.

The spelling of 821372 in words is "eight hundred twenty-one thousand, three hundred seventy-two".