1265556 has 24 divisors (see below), whose sum is σ = 2971584. Its totient is φ = 419200.

The previous prime is 1265549. The next prime is 1265557. The reversal of 1265556 is 6555621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2956 + ... + 3356.

It is an arithmetic number, because the mean of its divisors is an integer number (123816).

2^1265556 is an apocalyptic number.

It is an amenable number.

1265556 is an abundant number, since it is smaller than the sum of its proper divisors (1706028).

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

1265556 is a wasteful number, since it uses less digits than its factorization.

1265556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671 (or 669 counting only the distinct ones).

The product of its digits is 9000, while the sum is 30.

The square root of 1265556 is about 1124.9693329153. The cubic root of 1265556 is about 108.1667520046.

The spelling of 1265556 in words is "one million, two hundred sixty-five thousand, five hundred fifty-six".