642972043 has 8 divisors (see below), whose sum is σ = 739692800. Its totient is φ = 547468200.

The previous prime is 642972017. The next prime is 642972047. The reversal of 642972043 is 340279246.

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 642972043 - 2⁹ = 642971531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 642971993 and 642972011.

It is not an unprimeable number, because it can be changed into a prime (642972047) 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, 303093 + ... + 305206.

It is an arithmetic number, because the mean of its divisors is an integer number (92461600).

Almost surely, 2^642972043 is an apocalyptic number.

642972043 is a deficient number, since it is larger than the sum of its proper divisors (96720757).

642972043 is a wasteful number, since it uses less digits than its factorization.

642972043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608457.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 642972043 is about 25356.8934019923. The cubic root of 642972043 is about 863.1057898597.

The spelling of 642972043 in words is "six hundred forty-two million, nine hundred seventy-two thousand, forty-three".