1250564985 has 24 divisors (see below), whose sum is σ = 2220518664. Its totient is φ = 650699520.

The previous prime is 1250564969. The next prime is 1250565059. The reversal of 1250564985 is 5894650521.

1250564985 is a `hidden beast` number, since 1 + 2 + 5 + 0 + 564 + 9 + 85 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 194769936 + 1055795049 = 13956^2 + 32493^2 .

It is not a de Polignac number, because 1250564985 - 2⁴ = 1250564969 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1250564985.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 337062 + ... + 340751.

It is an arithmetic number, because the mean of its divisors is an integer number (92521611).

Almost surely, 2^1250564985 is an apocalyptic number.

1250564985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1250564985 is a deficient number, since it is larger than the sum of its proper divisors (969953679).

1250564985 is a wasteful number, since it uses less digits than its factorization.

1250564985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677865 (or 677862 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The square root of 1250564985 is about 35363.3282511700. The cubic root of 1250564985 is about 1077.3796170078.

The spelling of 1250564985 in words is "one billion, two hundred fifty million, five hundred sixty-four thousand, nine hundred eighty-five".