42255724 has 12 divisors (see below), whose sum is σ = 84511504. Its totient is φ = 18109584.

The previous prime is 42255701. The next prime is 42255749. The reversal of 42255724 is 42755224.

42255724 is an admirable number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754539 + ... + 754594.

Almost surely, 2^42255724 is an apocalyptic number.

It is an amenable number.

42255724 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42255724 is a wasteful number, since it uses less digits than its factorization.

42255724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509144 (or 1509142 counting only the distinct ones).

The product of its digits is 22400, while the sum is 31.

The square root of 42255724 is about 6500.4402927802. The cubic root of 42255724 is about 348.3067164225.

Subtracting 42255724 from its reverse (42755224), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 42255724 in words is "forty-two million, two hundred fifty-five thousand, seven hundred twenty-four".