642465542 has 16 divisors (see below), whose sum is σ = 981042864. Its totient is φ = 315468000.

The previous prime is 642465529. The next prime is 642465559. The reversal of 642465542 is 245564246.

642465542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 642465496 and 642465505.

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, 80492 + ... + 88112.

It is an arithmetic number, because the mean of its divisors is an integer number (61315179).

Almost surely, 2^642465542 is an apocalyptic number.

642465542 is a deficient number, since it is larger than the sum of its proper divisors (338577322).

642465542 is a wasteful number, since it uses less digits than its factorization.

642465542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8375.

The product of its digits is 230400, while the sum is 38.

The square root of 642465542 is about 25346.9039924011. The cubic root of 642465542 is about 862.8790932287.

The spelling of 642465542 in words is "six hundred forty-two million, four hundred sixty-five thousand, five hundred forty-two".