42100456 has 8 divisors (see below), whose sum is σ = 78938370. Its totient is φ = 21050224.

The previous prime is 42100451. The next prime is 42100463. The reversal of 42100456 is 65400124.

It can be written as a sum of positive squares in only one way, i.e., 21252100 + 20848356 = 4610^2 + 4566^2 .

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

It is not an unprimeable number, because it can be changed into a prime (42100451) 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 as a sum of consecutive naturals, namely, 2631271 + ... + 2631286.

Almost surely, 2^42100456 is an apocalyptic number.

It is an amenable number.

42100456 is a deficient number, since it is larger than the sum of its proper divisors (36837914).

42100456 is a wasteful number, since it uses less digits than its factorization.

42100456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5262563 (or 5262559 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 42100456 is about 6488.4864182643. The cubic root of 42100456 is about 347.8795769530.

The spelling of 42100456 in words is "forty-two million, one hundred thousand, four hundred fifty-six".