1321155325 has 12 divisors (see below), whose sum is σ = 1872266080. Its totient is φ = 905934960.

The previous prime is 1321155313. The next prime is 1321155331. The reversal of 1321155325 is 5235511231.

It is not a de Polignac number, because 1321155325 - 2⁷ = 1321155197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321155293 and 1321155302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3774555 + ... + 3774904.

Almost surely, 2^1321155325 is an apocalyptic number.

It is an amenable number.

1321155325 is a deficient number, since it is larger than the sum of its proper divisors (551110755).

1321155325 is an equidigital number, since it uses as much as digits as its factorization.

1321155325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7549476 (or 7549471 counting only the distinct ones).

The product of its digits is 4500, while the sum is 28.

The square root of 1321155325 is about 36347.7004086916. The cubic root of 1321155325 is about 1097.2812542388.

Adding to 1321155325 its reverse (5235511231), we get a palindrome (6556666556).

The spelling of 1321155325 in words is "one billion, three hundred twenty-one million, one hundred fifty-five thousand, three hundred twenty-five".