654651 has 6 divisors (see below), whose sum is σ = 945620. Its totient is φ = 436428.

The previous prime is 654629. The next prime is 654671. The reversal of 654651 is 156456.

It is a happy number.

654651 is a `hidden beast` number, since 6 + 5 + 4 + 651 = 666.

It is not a de Polignac number, because 654651 - 2⁶ = 654587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36361 + ... + 36378.

2⁶⁵⁴⁶⁵¹ is an apocalyptic number.

654651 is a deficient number, since it is larger than the sum of its proper divisors (290969).

654651 is a wasteful number, since it uses less digits than its factorization.

654651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72745 (or 72742 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 654651 is about 809.1050611633. The cubic root of 654651 is about 86.8300288267.

The spelling of 654651 in words is "six hundred fifty-four thousand, six hundred fifty-one".