1556994 has 8 divisors (see below), whose sum is σ = 3114000. Its totient is φ = 518996.

The previous prime is 1556977. The next prime is 1557001. The reversal of 1556994 is 4996551.

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

1556994 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129744 + ... + 129755.

It is an arithmetic number, because the mean of its divisors is an integer number (389250).

2^1556994 is an apocalyptic number.

1556994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1556994 is a wasteful number, since it uses less digits than its factorization.

1556994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259504.

The product of its digits is 48600, while the sum is 39.

The square root of 1556994 is about 1247.7956563476. The cubic root of 1556994 is about 115.9032586209.

The spelling of 1556994 in words is "one million, five hundred fifty-six thousand, nine hundred ninety-four".