651072 has 28 divisors (see below), whose sum is σ = 1723136. Its totient is φ = 216960.

The previous prime is 651071. The next prime is 651097. The reversal of 651072 is 270156.

651072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651071) 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, 1504 + ... + 1887.

2⁶⁵¹⁰⁷² is an apocalyptic number.

It is an amenable number.

651072 is an abundant number, since it is smaller than the sum of its proper divisors (1072064).

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

651072 is a wasteful number, since it uses less digits than its factorization.

651072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3406 (or 3396 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 651072 is about 806.8903271201. The cubic root of 651072 is about 86.6715053183.

The spelling of 651072 in words is "six hundred fifty-one thousand, seventy-two".