1266556 has 12 divisors (see below), whose sum is σ = 2263968. Its totient is φ = 619712.

The previous prime is 1266539. The next prime is 1266557. The reversal of 1266556 is 6556621.

It is a super-2 number, since 2×1266556² = 3208328202272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3181 + ... + 3556.

It is an arithmetic number, because the mean of its divisors is an integer number (188664).

2^1266556 is an apocalyptic number.

It is an amenable number.

1266556 is a deficient number, since it is larger than the sum of its proper divisors (997412).

1266556 is a wasteful number, since it uses less digits than its factorization.

1266556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6788 (or 6786 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 1266556 is about 1125.4137017115. The cubic root of 1266556 is about 108.1952344198.

It can be divided in two parts, 12665 and 56, that added together give a palindrome (12721).

The spelling of 1266556 in words is "one million, two hundred sixty-six thousand, five hundred fifty-six".