42556725 has 48 divisors (see below), whose sum is σ = 79429440. Its totient is φ = 22334400.

The previous prime is 42556699. The next prime is 42556733. The reversal of 42556725 is 52765524.

42556725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42556725 - 2⁸ = 42556469 is a prime.

It is a super-2 number, since 2×42556725² = 3622149685451250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42556725.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44755 + ... + 45695.

It is an arithmetic number, because the mean of its divisors is an integer number (1654780).

Almost surely, 2^42556725 is an apocalyptic number.

42556725 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42556725 is a deficient number, since it is larger than the sum of its proper divisors (36872715).

42556725 is a wasteful number, since it uses less digits than its factorization.

42556725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027 (or 1016 counting only the distinct ones).

The product of its digits is 84000, while the sum is 36.

The square root of 42556725 is about 6523.5515633740. The cubic root of 42556725 is about 349.1317936956.

The spelling of 42556725 in words is "forty-two million, five hundred fifty-six thousand, seven hundred twenty-five".