1555996 has 24 divisors (see below), whose sum is σ = 3062304. Its totient is φ = 686400.

The previous prime is 1555969. The next prime is 1555997. The reversal of 1555996 is 6995551.

It is a super-2 number, since 2×1555996² = 4842247104032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546 + ... + 1846.

It is an arithmetic number, because the mean of its divisors is an integer number (127596).

2^1555996 is an apocalyptic number.

It is an amenable number.

1555996 is a deficient number, since it is larger than the sum of its proper divisors (1506308).

1555996 is a wasteful number, since it uses less digits than its factorization.

1555996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341 (or 1339 counting only the distinct ones).

The product of its digits is 60750, while the sum is 40.

The square root of 1555996 is about 1247.3956870216. The cubic root of 1555996 is about 115.8784894878.

The spelling of 1555996 in words is "one million, five hundred fifty-five thousand, nine hundred ninety-six".