42403556 has 12 divisors (see below), whose sum is σ = 79914492. Its totient is φ = 19570848.

The previous prime is 42403549. The next prime is 42403561. The reversal of 42403556 is 65530424.

It can be written as a sum of positive squares in 2 ways, for example, as 27457600 + 14945956 = 5240^2 + 3866^2 .

It is a super-2 number, since 2×42403556² = 3596123122890272, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 407675 + ... + 407778.

It is an arithmetic number, because the mean of its divisors is an integer number (6659541).

Almost surely, 2^42403556 is an apocalyptic number.

It is an amenable number.

42403556 is a deficient number, since it is larger than the sum of its proper divisors (37510936).

42403556 is a wasteful number, since it uses less digits than its factorization.

42403556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815470 (or 815468 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 42403556 is about 6511.8012868944. The cubic root of 42403556 is about 348.7124283039.

The spelling of 42403556 in words is "forty-two million, four hundred three thousand, five hundred fifty-six".