656742 has 16 divisors (see below), whose sum is σ = 1370880. Its totient is φ = 209352.

The previous prime is 656741. The next prime is 656749. The reversal of 656742 is 247656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656741) 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, 2242 + ... + 2517.

It is an arithmetic number, because the mean of its divisors is an integer number (85680).

2⁶⁵⁶⁷⁴² is an apocalyptic number.

656742 is an abundant number, since it is smaller than the sum of its proper divisors (714138).

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

656742 is a wasteful number, since it uses less digits than its factorization.

656742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4787.

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

The square root of 656742 is about 810.3961993988. The cubic root of 656742 is about 86.9223775875.

The spelling of 656742 in words is "six hundred fifty-six thousand, seven hundred forty-two".