642162087 has 20 divisors (see below), whose sum is σ = 1096320016. Its totient is φ = 366949440.

The previous prime is 642162083. The next prime is 642162107. The reversal of 642162087 is 780261246.

642162087 is a `hidden beast` number, since 6 + 4 + 21 + 620 + 8 + 7 = 666.

It is not a de Polignac number, because 642162087 - 2² = 642162083 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 (642162083) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 565714 + ... + 566847.

Almost surely, 2^642162087 is an apocalyptic number.

642162087 is a deficient number, since it is larger than the sum of its proper divisors (454157929).

642162087 is a wasteful number, since it uses less digits than its factorization.

642162087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132580 (or 1132571 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 642162087 is about 25340.9172485922. The cubic root of 642162087 is about 862.7432176086.

The spelling of 642162087 in words is "six hundred forty-two million, one hundred sixty-two thousand, eighty-seven".