1290556 has 12 divisors (see below), whose sum is σ = 2377480. Its totient is φ = 611280.

The previous prime is 1290551. The next prime is 1290563. The reversal of 1290556 is 6550921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290551) 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 3 ways as a sum of consecutive naturals, for example, 8415 + ... + 8566.

2^1290556 is an apocalyptic number.

It is an amenable number.

1290556 is a deficient number, since it is larger than the sum of its proper divisors (1086924).

1290556 is a wasteful number, since it uses less digits than its factorization.

1290556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17004 (or 17002 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 1290556 is about 1136.0264081438. The cubic root of 1290556 is about 108.8743607501.

The spelling of 1290556 in words is "one million, two hundred ninety thousand, five hundred fifty-six".