42520479 has 4 divisors (see below), whose sum is σ = 56693976. Its totient is φ = 28346984.

The previous prime is 42520447. The next prime is 42520487. The reversal of 42520479 is 97402524.

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 42520479 - 2⁵ = 42520447 is a prime.

It is a super-2 number, since 2×42520479² = 3615982268778882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42524479) 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, 7086744 + ... + 7086749.

It is an arithmetic number, because the mean of its divisors is an integer number (14173494).

Almost surely, 2^42520479 is an apocalyptic number.

42520479 is a deficient number, since it is larger than the sum of its proper divisors (14173497).

42520479 is a wasteful number, since it uses less digits than its factorization.

42520479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14173496.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 42520479 is about 6520.7728836389. The cubic root of 42520479 is about 349.0326458297.

The spelling of 42520479 in words is "forty-two million, five hundred twenty thousand, four hundred seventy-nine".