42804957 has 16 divisors (see below), whose sum is σ = 63584640. Its totient is φ = 25432512.

The previous prime is 42804953. The next prime is 42804959. The reversal of 42804957 is 75940824.

It is not a de Polignac number, because 42804957 - 2² = 42804953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42804953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17793 + ... + 20054.

It is an arithmetic number, because the mean of its divisors is an integer number (3974040).

Almost surely, 2^42804957 is an apocalyptic number.

It is an amenable number.

42804957 is a deficient number, since it is larger than the sum of its proper divisors (20779683).

42804957 is a wasteful number, since it uses less digits than its factorization.

42804957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37892.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 42804957 is about 6542.5497323291. The cubic root of 42804957 is about 349.8093029205.

The spelling of 42804957 in words is "forty-two million, eight hundred four thousand, nine hundred fifty-seven".