642972041 has 8 divisors (see below), whose sum is σ = 650707200. Its totient is φ = 635265792.

The previous prime is 642972017. The next prime is 642972047. The reversal of 642972041 is 140279246.

642972041 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 642972041 - 2¹⁸ = 642709897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 642971992 and 642972010.

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, 39296 + ... + 53198.

It is an arithmetic number, because the mean of its divisors is an integer number (81338400).

Almost surely, 2^642972041 is an apocalyptic number.

It is an amenable number.

642972041 is a deficient number, since it is larger than the sum of its proper divisors (7735159).

642972041 is a wasteful number, since it uses less digits than its factorization.

642972041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14455.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 642972041 is about 25356.8933625553. The cubic root of 642972041 is about 863.1057889648.

The spelling of 642972041 in words is "six hundred forty-two million, nine hundred seventy-two thousand, forty-one".