42219479 has 4 divisors (see below), whose sum is σ = 43360584. Its totient is φ = 41078376.

The previous prime is 42219469. The next prime is 42219487. The reversal of 42219479 is 97491224.

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 42219479 - 2⁸ = 42219223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42219469) 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, 570497 + ... + 570570.

It is an arithmetic number, because the mean of its divisors is an integer number (10840146).

Almost surely, 2^42219479 is an apocalyptic number.

42219479 is a deficient number, since it is larger than the sum of its proper divisors (1141105).

42219479 is a wasteful number, since it uses less digits than its factorization.

42219479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141104.

The product of its digits is 36288, while the sum is 38.

The square root of 42219479 is about 6497.6518066144. The cubic root of 42219479 is about 348.2071008202.

The spelling of 42219479 in words is "forty-two million, two hundred nineteen thousand, four hundred seventy-nine".