1321369825 has 6 divisors (see below), whose sum is σ = 1638498614. Its totient is φ = 1057095840.

The previous prime is 1321369811. The next prime is 1321369873. The reversal of 1321369825 is 5289631231.

It can be written as a sum of positive squares in 3 ways, for example, as 192721 + 1321177104 = 439^2 + 36348^2 .

It is not a de Polignac number, because 1321369825 - 2¹⁵ = 1321337057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26427372 + ... + 26427421.

Almost surely, 2^1321369825 is an apocalyptic number.

It is an amenable number.

1321369825 is a deficient number, since it is larger than the sum of its proper divisors (317128789).

1321369825 is an equidigital number, since it uses as much as digits as its factorization.

1321369825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52854803 (or 52854798 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The square root of 1321369825 is about 36350.6509570324. The cubic root of 1321369825 is about 1097.3406351175.

It can be divided in two parts, 13213 and 69825, that added together give a palindrome (83038).

The spelling of 1321369825 in words is "one billion, three hundred twenty-one million, three hundred sixty-nine thousand, eight hundred twenty-five".