642015065 has 8 divisors (see below), whose sum is σ = 786810240. Its totient is φ = 502683952.

The previous prime is 642015061. The next prime is 642015097. The reversal of 642015065 is 560510246.

642015065 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 cyclic number.

It is not a de Polignac number, because 642015065 - 2² = 642015061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642015061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1365755 + ... + 1366224.

It is an arithmetic number, because the mean of its divisors is an integer number (98351280).

Almost surely, 2^642015065 is an apocalyptic number.

It is an amenable number.

642015065 is a deficient number, since it is larger than the sum of its proper divisors (144795175).

642015065 is a wasteful number, since it uses less digits than its factorization.

642015065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732031.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 642015065 is about 25338.0162009578. The cubic root of 642015065 is about 862.6773713489.

The spelling of 642015065 in words is "six hundred forty-two million, fifteen thousand, sixty-five".