42817256 has 8 divisors (see below), whose sum is σ = 80282370. Its totient is φ = 21408624.

The previous prime is 42817249. The next prime is 42817259. The reversal of 42817256 is 65271824.

42817256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 31024900 + 11792356 = 5570^2 + 3434^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×42817256² = 3666634822739072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42817259) by changing a digit.

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 as a sum of consecutive naturals, namely, 2676071 + ... + 2676086.

Almost surely, 2^42817256 is an apocalyptic number.

It is an amenable number.

42817256 is a deficient number, since it is larger than the sum of its proper divisors (37465114).

42817256 is a wasteful number, since it uses less digits than its factorization.

42817256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5352163 (or 5352159 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 42817256 is about 6543.4895888967. The cubic root of 42817256 is about 349.8428028773.

The spelling of 42817256 in words is "forty-two million, eight hundred seventeen thousand, two hundred fifty-six".