42020456 has 16 divisors (see below), whose sum is σ = 80918340. Its totient is φ = 20442240.

The previous prime is 42020441. The next prime is 42020483. The reversal of 42020456 is 65402024.

It can be written as a sum of positive squares in 2 ways, for example, as 41396356 + 624100 = 6434^2 + 790^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70685 + ... + 71276.

Almost surely, 2^42020456 is an apocalyptic number.

It is an amenable number.

42020456 is a deficient number, since it is larger than the sum of its proper divisors (38897884).

42020456 is a wasteful number, since it uses less digits than its factorization.

42020456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142004 (or 142000 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 42020456 is about 6482.3187209516. The cubic root of 42020456 is about 347.6590883460.

The spelling of 42020456 in words is "forty-two million, twenty thousand, four hundred fifty-six".