1325567857 has 8 divisors (see below), whose sum is σ = 1349579880. Its totient is φ = 1301771520.

The previous prime is 1325567839. The next prime is 1325567917. The reversal of 1325567857 is 7587655231.

It can be written as a sum of positive squares in 4 ways, for example, as 92083216 + 1233484641 = 9596^2 + 35121^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1325567857 - 2⁷ = 1325567729 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1325567857.

It is not an unprimeable number, because it can be changed into a prime (1325567827) 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, 41494 + ... + 66127.

It is an arithmetic number, because the mean of its divisors is an integer number (168697485).

Almost surely, 2^1325567857 is an apocalyptic number.

It is an amenable number.

1325567857 is a deficient number, since it is larger than the sum of its proper divisors (24012023).

1325567857 is a wasteful number, since it uses less digits than its factorization.

1325567857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107843.

The product of its digits is 1764000, while the sum is 49.

The square root of 1325567857 is about 36408.3487266314. The cubic root of 1325567857 is about 1098.5015014385.

The spelling of 1325567857 in words is "one billion, three hundred twenty-five million, five hundred sixty-seven thousand, eight hundred fifty-seven".