651872 has 24 divisors (see below), whose sum is σ = 1382976. Its totient is φ = 300672.

The previous prime is 651869. The next prime is 651877. The reversal of 651872 is 278156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368 + ... + 1199.

It is an arithmetic number, because the mean of its divisors is an integer number (57624).

2⁶⁵¹⁸⁷² is an apocalyptic number.

It is an amenable number.

651872 is an abundant number, since it is smaller than the sum of its proper divisors (731104).

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

651872 is a wasteful number, since it uses less digits than its factorization.

651872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590 (or 1582 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 651872 is about 807.3859052523. The cubic root of 651872 is about 86.7069897831.

The spelling of 651872 in words is "six hundred fifty-one thousand, eight hundred seventy-two".