1253155856 has 20 divisors (see below), whose sum is σ = 2429930412. Its totient is φ = 626077056.

The previous prime is 1253155831. The next prime is 1253155861. The reversal of 1253155856 is 6585513521.

It can be written as a sum of positive squares in 2 ways, for example, as 1075840000 + 177315856 = 32800^2 + 13316^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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, 10235 + ... + 51098.

Almost surely, 2^1253155856 is an apocalyptic number.

1253155856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1253155856 is a deficient number, since it is larger than the sum of its proper divisors (1176774556).

1253155856 is a wasteful number, since it uses less digits than its factorization.

1253155856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62618 (or 62612 counting only the distinct ones).

The product of its digits is 180000, while the sum is 41.

The square root of 1253155856 is about 35399.9414688782. The cubic root of 1253155856 is about 1078.1231279234.

The spelling of 1253155856 in words is "one billion, two hundred fifty-three million, one hundred fifty-five thousand, eight hundred fifty-six".