42756225 has 12 divisors (see below), whose sum is σ = 70690416. Its totient is φ = 22803280.

The previous prime is 42756151. The next prime is 42756239. The reversal of 42756225 is 52265724.

It is not a de Polignac number, because 42756225 - 2⁷ = 42756097 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 284967 + ... + 285116.

It is an arithmetic number, because the mean of its divisors is an integer number (5890868).

Almost surely, 2^42756225 is an apocalyptic number.

It is an amenable number.

42756225 is a deficient number, since it is larger than the sum of its proper divisors (27934191).

42756225 is a wasteful number, since it uses less digits than its factorization.

42756225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570096 (or 570091 counting only the distinct ones).

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

The square root of 42756225 is about 6538.8244356306. The cubic root of 42756225 is about 349.6765038138.

The spelling of 42756225 in words is "forty-two million, seven hundred fifty-six thousand, two hundred twenty-five".