642515046 has 16 divisors (see below), whose sum is σ = 1286750208. Its totient is φ = 213885000.

The previous prime is 642515033. The next prime is 642515053. The reversal of 642515046 is 640515246.

It is a junction number, because it is equal to n+sod(n) for n = 642514998 and 642515016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66790 + ... + 75801.

It is an arithmetic number, because the mean of its divisors is an integer number (80421888).

Almost surely, 2^642515046 is an apocalyptic number.

642515046 is an abundant number, since it is smaller than the sum of its proper divisors (644235162).

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

642515046 is a wasteful number, since it uses less digits than its factorization.

642515046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143347.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 642515046 is about 25347.8805031111. The cubic root of 642515046 is about 862.9012551797.

The spelling of 642515046 in words is "six hundred forty-two million, five hundred fifteen thousand, forty-six".