42972279 has 8 divisors (see below), whose sum is σ = 65481600. Its totient is φ = 24555576.

The previous prime is 42972263. The next prime is 42972289. The reversal of 42972279 is 97227924.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42972279 - 2⁴ = 42972263 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 42972279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42972289) 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, 1023129 + ... + 1023170.

It is an arithmetic number, because the mean of its divisors is an integer number (8185200).

Almost surely, 2^42972279 is an apocalyptic number.

42972279 is a deficient number, since it is larger than the sum of its proper divisors (22509321).

42972279 is a wasteful number, since it uses less digits than its factorization.

42972279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2046309.

The product of its digits is 127008, while the sum is 42.

The square root of 42972279 is about 6555.3244770949. The cubic root of 42972279 is about 350.2645048178.

The spelling of 42972279 in words is "forty-two million, nine hundred seventy-two thousand, two hundred seventy-nine".