651492 has 18 divisors (see below), whose sum is σ = 1646918. Its totient is φ = 217152.

The previous prime is 651487. The next prime is 651503. The reversal of 651492 is 294156.

651492 is a `hidden beast` number, since 651 + 4 + 9 + 2 = 666.

651492 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 443556 + 207936 = 666^2 + 456^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 651492.

It is an unprimeable number.

651492 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9013 + ... + 9084.

2⁶⁵¹⁴⁹² is an apocalyptic number.

It is an amenable number.

651492 is an abundant number, since it is smaller than the sum of its proper divisors (995426).

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

651492 is a wasteful number, since it uses less digits than its factorization.

651492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18107 (or 18102 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 651492 is about 807.1505435791. The cubic root of 651492 is about 86.6901382844.

The spelling of 651492 in words is "six hundred fifty-one thousand, four hundred ninety-two".