646572 has 12 divisors (see below), whose sum is σ = 1508696. Its totient is φ = 215520.

The previous prime is 646571. The next prime is 646573. The reversal of 646572 is 275646.

It is an interprime number because it is at equal distance from previous prime (646571) and next prime (646573).

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (646571) 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, 26929 + ... + 26952.

2⁶⁴⁶⁵⁷² is an apocalyptic number.

It is an amenable number.

646572 is an abundant number, since it is smaller than the sum of its proper divisors (862124).

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

646572 is a wasteful number, since it uses less digits than its factorization.

646572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53888 (or 53886 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 646572 is about 804.0970090729. The cubic root of 646572 is about 86.4713616534.

The spelling of 646572 in words is "six hundred forty-six thousand, five hundred seventy-two".