1321465825 has 12 divisors (see below), whose sum is σ = 1658362608. Its totient is φ = 1044434000.

The previous prime is 1321465787. The next prime is 1321465837. The reversal of 1321465825 is 5285641231.

It is a de Polignac number, because none of the positive numbers 2^k-1321465825 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316351 + ... + 320500.

It is an arithmetic number, because the mean of its divisors is an integer number (138196884).

Almost surely, 2^1321465825 is an apocalyptic number.

It is an amenable number.

1321465825 is a deficient number, since it is larger than the sum of its proper divisors (336896783).

1321465825 is an equidigital number, since it uses as much as digits as its factorization.

1321465825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636944 (or 636939 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

The square root of 1321465825 is about 36351.9714045882. The cubic root of 1321465825 is about 1097.3672090934.

The spelling of 1321465825 in words is "one billion, three hundred twenty-one million, four hundred sixty-five thousand, eight hundred twenty-five".