642076005 has 8 divisors (see below), whose sum is σ = 1027321632. Its totient is φ = 342440528.

The previous prime is 642075997. The next prime is 642076007. The reversal of 642076005 is 500670246.

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 642076005 - 2³ = 642075997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642076007) 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, 21402519 + ... + 21402548.

It is an arithmetic number, because the mean of its divisors is an integer number (128415204).

Almost surely, 2^642076005 is an apocalyptic number.

It is an amenable number.

642076005 is a deficient number, since it is larger than the sum of its proper divisors (385245627).

642076005 is a wasteful number, since it uses less digits than its factorization.

642076005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42805075.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 642076005 is about 25339.2187132911. The cubic root of 642076005 is about 862.7046655661.

The spelling of 642076005 in words is "six hundred forty-two million, seventy-six thousand, five".