42256725 has 24 divisors (see below), whose sum is σ = 79846080. Its totient is φ = 19317120.

The previous prime is 42256693. The next prime is 42256729. The reversal of 42256725 is 52765224.

It is not a de Polignac number, because 42256725 - 2⁵ = 42256693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42256729) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 39720 + ... + 40769.

It is an arithmetic number, because the mean of its divisors is an integer number (3326920).

Almost surely, 2^42256725 is an apocalyptic number.

It is an amenable number.

42256725 is a deficient number, since it is larger than the sum of its proper divisors (37589355).

42256725 is a wasteful number, since it uses less digits than its factorization.

42256725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80509 (or 80504 counting only the distinct ones).

The product of its digits is 33600, while the sum is 33.

The square root of 42256725 is about 6500.5172871088. The cubic root of 42256725 is about 348.3094667581.

The spelling of 42256725 in words is "forty-two million, two hundred fifty-six thousand, seven hundred twenty-five".