56421086 has 8 divisors (see below), whose sum is σ = 84726480. Its totient is φ = 28178928.

The previous prime is 56421083. The next prime is 56421091. The reversal of 56421086 is 68012465.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56421083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13511 + ... + 17186.

It is an arithmetic number, because the mean of its divisors is an integer number (10590810).

Almost surely, 2^56421086 is an apocalyptic number.

56421086 is a deficient number, since it is larger than the sum of its proper divisors (28305394).

56421086 is a wasteful number, since it uses less digits than its factorization.

56421086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31618.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 56421086 is about 7511.3970737806. The cubic root of 56421086 is about 383.5427817375.

The spelling of 56421086 in words is "fifty-six million, four hundred twenty-one thousand, eighty-six".