1556856 has 48 divisors (see below), whose sum is σ = 4820400. Its totient is φ = 444672.

The previous prime is 1556839. The next prime is 1556869. The reversal of 1556856 is 6586551.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1556856.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 1041 + ... + 2048.

It is an arithmetic number, because the mean of its divisors is an integer number (100425).

2^1556856 is an apocalyptic number.

It is an amenable number.

1556856 is an abundant number, since it is smaller than the sum of its proper divisors (3263544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1556856 is a wasteful number, since it uses less digits than its factorization.

1556856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3108 (or 3101 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

The square root of 1556856 is about 1247.7403576065. The cubic root of 1556856 is about 115.8998342613.

The spelling of 1556856 in words is "one million, five hundred fifty-six thousand, eight hundred fifty-six".