1325891513 has 8 divisors (see below), whose sum is σ = 1397493000. Its totient is φ = 1256015488.

The previous prime is 1325891509. The next prime is 1325891519. The reversal of 1325891513 is 3151985231.

It can be written as a sum of positive squares in 4 ways, for example, as 543682489 + 782209024 = 23317^2 + 27968^2 .

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 1325891513 - 2² = 1325891509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1325891519) 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, 429788 + ... + 432861.

It is an arithmetic number, because the mean of its divisors is an integer number (174686625).

Almost surely, 2^1325891513 is an apocalyptic number.

It is an amenable number.

1325891513 is a deficient number, since it is larger than the sum of its proper divisors (71601487).

1325891513 is an equidigital number, since it uses as much as digits as its factorization.

1325891513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862731.

The product of its digits is 32400, while the sum is 38.

The square root of 1325891513 is about 36412.7932600618. The cubic root of 1325891513 is about 1098.5908990169.

The spelling of 1325891513 in words is "one billion, three hundred twenty-five million, eight hundred ninety-one thousand, five hundred thirteen".