642857130 has 48 divisors (see below), whose sum is σ = 1744104960. Its totient is φ = 163974624.

The previous prime is 642857119. The next prime is 642857141. The reversal of 642857130 is 31758246.

642857130 is a `hidden beast` number, since 64 + 28 + 571 + 3 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (642857119) and next prime (642857141).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 153210 + ... + 157349.

It is an arithmetic number, because the mean of its divisors is an integer number (36335520).

Almost surely, 2^642857130 is an apocalyptic number.

642857130 is an abundant number, since it is smaller than the sum of its proper divisors (1101247830).

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

642857130 is a wasteful number, since it uses less digits than its factorization.

642857130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310595 (or 310592 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 642857130 is about 25354.6273883092. The cubic root of 642857130 is about 863.0543682435.

The spelling of 642857130 in words is "six hundred forty-two million, eight hundred fifty-seven thousand, one hundred thirty".