1253668 has 12 divisors (see below), whose sum is σ = 2362780. Its totient is φ = 578592.

The previous prime is 1253627. The next prime is 1253683. The reversal of 1253668 is 8663521.

It can be written as a sum of positive squares in 2 ways, for example, as 465124 + 788544 = 682^2 + 888^2 .

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12003 + ... + 12106.

2^1253668 is an apocalyptic number.

It is an amenable number.

1253668 is a deficient number, since it is larger than the sum of its proper divisors (1109112).

1253668 is a wasteful number, since it uses less digits than its factorization.

1253668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24126 (or 24124 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 1253668 is about 1119.6731665982. The cubic root of 1253668 is about 107.8269978263.

The spelling of 1253668 in words is "one million, two hundred fifty-three thousand, six hundred sixty-eight".