1005556 has 24 divisors (see below), whose sum is σ = 1884960. Its totient is φ = 468000.

The previous prime is 1005553. The next prime is 1005581. The reversal of 1005556 is 6555001.

It is a super-2 number, since 2×1005556² = 2022285738272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7611 + ... + 7741.

It is an arithmetic number, because the mean of its divisors is an integer number (78540).

2^1005556 is an apocalyptic number.

It is an amenable number.

1005556 is a deficient number, since it is larger than the sum of its proper divisors (879404).

1005556 is a wasteful number, since it uses less digits than its factorization.

1005556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 1005556 is about 1002.7741520402. The cubic root of 1005556 is about 100.1848580644.

The spelling of 1005556 in words is "one million, five thousand, five hundred fifty-six".