642502629 has 6 divisors (see below), whose sum is σ = 928059366. Its totient is φ = 428335080.

The previous prime is 642502589. The next prime is 642502633. The reversal of 642502629 is 926205246.

642502629 is a `hidden beast` number, since 6 + 4 + 25 + 0 + 2 + 629 = 666.

It can be written as a sum of positive squares in only one way, i.e., 627502500 + 15000129 = 25050^2 + 3873^2 .

It is not a de Polignac number, because 642502629 - 2¹⁷ = 642371557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 642502593 and 642502602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642502649) 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, 35694582 + ... + 35694599.

It is an arithmetic number, because the mean of its divisors is an integer number (154676561).

Almost surely, 2^642502629 is an apocalyptic number.

It is an amenable number.

642502629 is a deficient number, since it is larger than the sum of its proper divisors (285556737).

642502629 is a wasteful number, since it uses less digits than its factorization.

642502629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71389187 (or 71389184 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 642502629 is about 25347.6355702065. The cubic root of 642502629 is about 862.8956964440.

The spelling of 642502629 in words is "six hundred forty-two million, five hundred two thousand, six hundred twenty-nine".