642725032 has 32 divisors (see below), whose sum is σ = 1219341600. Its totient is φ = 317582784.

The previous prime is 642725003. The next prime is 642725063. The reversal of 642725032 is 230527246.

It is a junction number, because it is equal to n+sod(n) for n = 642724985 and 642725003.

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, 529258 + ... + 530470.

It is an arithmetic number, because the mean of its divisors is an integer number (38104425).

Almost surely, 2^642725032 is an apocalyptic number.

It is an amenable number.

642725032 is a deficient number, since it is larger than the sum of its proper divisors (576616568).

642725032 is a wasteful number, since it uses less digits than its factorization.

642725032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945 (or 1941 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 642725032 is about 25352.0222467558. The cubic root of 642725032 is about 862.9952490600.

The spelling of 642725032 in words is "six hundred forty-two million, seven hundred twenty-five thousand, thirty-two".