642682595 has 4 divisors (see below), whose sum is σ = 771219120. Its totient is φ = 514146072.

The previous prime is 642682591. The next prime is 642682631. The reversal of 642682595 is 595286246.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 642682595 - 2² = 642682591 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642682591) 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, 64268255 + ... + 64268264.

It is an arithmetic number, because the mean of its divisors is an integer number (192804780).

Almost surely, 2^642682595 is an apocalyptic number.

642682595 is a deficient number, since it is larger than the sum of its proper divisors (128536525).

642682595 is a wasteful number, since it uses less digits than its factorization.

642682595 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128536524.

The product of its digits is 1036800, while the sum is 47.

The square root of 642682595 is about 25351.1852780102. The cubic root of 642682595 is about 862.9762550716.

The spelling of 642682595 in words is "six hundred forty-two million, six hundred eighty-two thousand, five hundred ninety-five".