642065902 has 8 divisors (see below), whose sum is σ = 968866416. Its totient is φ = 319110432.

The previous prime is 642065869. The next prime is 642065909. The reversal of 642065902 is 209560246.

642065902 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×642065902² = 824497245022147208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642065909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 960843 + ... + 961510.

It is an arithmetic number, because the mean of its divisors is an integer number (121108302).

Almost surely, 2^642065902 is an apocalyptic number.

642065902 is a deficient number, since it is larger than the sum of its proper divisors (326800514).

642065902 is a wasteful number, since it uses less digits than its factorization.

642065902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922522.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 642065902 is about 25339.0193575047. The cubic root of 642065902 is about 862.7001406859.

The spelling of 642065902 in words is "six hundred forty-two million, sixty-five thousand, nine hundred two".