651672 has 64 divisors (see below), whose sum is σ = 2073600. Its totient is φ = 185760.

The previous prime is 651667. The next prime is 651683. The reversal of 651672 is 276156.

651672 is a `hidden beast` number, since 651 + 6 + 7 + 2 = 666.

651672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 651672.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1297 + ... + 1727.

It is an arithmetic number, because the mean of its divisors is an integer number (32400).

2⁶⁵¹⁶⁷² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1036800).

651672 is an abundant number, since it is smaller than the sum of its proper divisors (1421928).

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

651672 is a wasteful number, since it uses less digits than its factorization.

651672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453 (or 443 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 651672 is about 807.2620392413. The cubic root of 651672 is about 86.6981213898.

The spelling of 651672 in words is "six hundred fifty-one thousand, six hundred seventy-two".