1006556 has 6 divisors (see below), whose sum is σ = 1761480. Its totient is φ = 503276.

The previous prime is 1006547. The next prime is 1006559. The reversal of 1006556 is 6556001.

It is a super-2 number, since 2×1006556² = 2026309962272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125816 + ... + 125823.

It is an arithmetic number, because the mean of its divisors is an integer number (293580).

2^1006556 is an apocalyptic number.

It is an amenable number.

1006556 is a deficient number, since it is larger than the sum of its proper divisors (754924).

1006556 is a wasteful number, since it uses less digits than its factorization.

1006556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251643 (or 251641 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1006556 is about 1003.2726448977. The cubic root of 1006556 is about 100.2180574970.

The spelling of 1006556 in words is "one million, six thousand, five hundred fifty-six".