42042256 has 15 divisors (see below), whose sum is σ = 81507153. Its totient is φ = 21008160.

The previous prime is 42042227. The next prime is 42042263. The reversal of 42042256 is 65224024.

The square root of 42042256 is 6484.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 32307856 + 9734400 = 5684^2 + 3120^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42042256.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 25126 + ... + 26746.

Almost surely, 2^42042256 is an apocalyptic number.

42042256 is the 6484-th square number.

It is an amenable number.

42042256 is a deficient number, since it is larger than the sum of its proper divisors (39464897).

42042256 is an frugal number, since it uses more digits than its factorization.

42042256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3250 (or 1623 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The cubic root of 42042256 is about 347.7191992109.

Multiplying 42042256 by its sum of digits (25), we get a square (1051056400 = 32420²).

The spelling of 42042256 in words is "forty-two million, forty-two thousand, two hundred fifty-six".