1321358225 has 12 divisors (see below), whose sum is σ = 1787437680. Its totient is φ = 960987600.

The previous prime is 1321358221. The next prime is 1321358237. The reversal of 1321358225 is 5228531231.

It is not a de Polignac number, because 1321358225 - 2² = 1321358221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321358191 and 1321358200.

It is not an unprimeable number, because it can be changed into a prime (1321358221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2402195 + ... + 2402744.

It is an arithmetic number, because the mean of its divisors is an integer number (148953140).

Almost surely, 2^1321358225 is an apocalyptic number.

It is an amenable number.

1321358225 is a deficient number, since it is larger than the sum of its proper divisors (466079455).

1321358225 is a wasteful number, since it uses less digits than its factorization.

1321358225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4804960 (or 4804955 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 1321358225 is about 36350.4913997046. The cubic root of 1321358225 is about 1097.3374240082.

Adding to 1321358225 its reverse (5228531231), we get a palindrome (6549889456).

The spelling of 1321358225 in words is "one billion, three hundred twenty-one million, three hundred fifty-eight thousand, two hundred twenty-five".