1245556 has 24 divisors (see below), whose sum is σ = 2487240. Its totient is φ = 540672.

The previous prime is 1245551. The next prime is 1245557. The reversal of 1245556 is 6555421.

It can be written as a sum of positive squares in 4 ways, for example, as 100 + 1245456 = 10^2 + 1116^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245551) 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, 180 + ... + 1588.

It is an arithmetic number, because the mean of its divisors is an integer number (103635).

2^1245556 is an apocalyptic number.

It is an amenable number.

1245556 is a deficient number, since it is larger than the sum of its proper divisors (1241684).

1245556 is a wasteful number, since it uses less digits than its factorization.

1245556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443 (or 1441 counting only the distinct ones).

The product of its digits is 6000, while the sum is 28.

The square root of 1245556 is about 1116.0448019681. The cubic root of 1245556 is about 107.5939254827.

The spelling of 1245556 in words is "one million, two hundred forty-five thousand, five hundred fifty-six".