642260804 has 6 divisors (see below), whose sum is σ = 1123956414. Its totient is φ = 321130400.

The previous prime is 642260761. The next prime is 642260807. The reversal of 642260804 is 408062246.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 523494400 + 118766404 = 22880^2 + 10898^2 .

It is not an unprimeable number, because it can be changed into a prime (642260807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80282597 + ... + 80282604.

It is an arithmetic number, because the mean of its divisors is an integer number (187326069).

Almost surely, 2^642260804 is an apocalyptic number.

It is an amenable number.

642260804 is a deficient number, since it is larger than the sum of its proper divisors (481695610).

642260804 is a wasteful number, since it uses less digits than its factorization.

642260804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160565205 (or 160565203 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 642260804 is about 25342.8649524871. The cubic root of 642260804 is about 862.7874240274.

The spelling of 642260804 in words is "six hundred forty-two million, two hundred sixty thousand, eight hundred four".