642043725 has 24 divisors (see below), whose sum is σ = 1117383840. Its totient is φ = 324400320.

The previous prime is 642043711. The next prime is 642043733. The reversal of 642043725 is 527340246.

642043725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 642043725 - 2¹¹ = 642041677 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 223854 + ... + 226703.

It is an arithmetic number, because the mean of its divisors is an integer number (46557660).

Almost surely, 2^642043725 is an apocalyptic number.

It is an amenable number.

642043725 is a deficient number, since it is larger than the sum of its proper divisors (475340115).

642043725 is a wasteful number, since it uses less digits than its factorization.

642043725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450589 (or 450584 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 33.

The square root of 642043725 is about 25338.5817479984. The cubic root of 642043725 is about 862.6902079976.

The spelling of 642043725 in words is "six hundred forty-two million, forty-three thousand, seven hundred twenty-five".