642574701 has 10 divisors (see below), whose sum is σ = 959895662. Its totient is φ = 428383080.

The previous prime is 642574679. The next prime is 642574711. The reversal of 642574701 is 107475246.

642574701 is a `hidden beast` number, since 642 + 5 + 7 + 4 + 7 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 404613225 + 237961476 = 20115^2 + 15426^2 .

It is not a de Polignac number, because 642574701 - 2¹¹ = 642572653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642574711) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3966430 + ... + 3966591.

Almost surely, 2^642574701 is an apocalyptic number.

It is an amenable number.

642574701 is a deficient number, since it is larger than the sum of its proper divisors (317320961).

642574701 is an equidigital number, since it uses as much as digits as its factorization.

642574701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7933033 (or 7933024 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 642574701 is about 25349.0572014030. The cubic root of 642574701 is about 862.9279600181.

The spelling of 642574701 in words is "six hundred forty-two million, five hundred seventy-four thousand, seven hundred one".