42621056 has 32 divisors (see below), whose sum is σ = 85215900. Its totient is φ = 21233664.

The previous prime is 42621049. The next prime is 42621079. The reversal of 42621056 is 65012624.

It can be written as a sum of positive squares in 2 ways, for example, as 39438400 + 3182656 = 6280^2 + 1784^2 .

It is a tau number, because it is divible by the number of its divisors (32).

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, 55040 + ... + 55808.

Almost surely, 2^42621056 is an apocalyptic number.

It is an amenable number.

42621056 is a deficient number, since it is larger than the sum of its proper divisors (42594844).

42621056 is an equidigital number, since it uses as much as digits as its factorization.

42621056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216 (or 1204 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 42621056 is about 6528.4803744823. The cubic root of 42621056 is about 349.3076271640.

The spelling of 42621056 in words is "forty-two million, six hundred twenty-one thousand, fifty-six".