1320312225 has 48 divisors (see below), whose sum is σ = 2325868992. Its totient is φ = 658575360.

The previous prime is 1320312221. The next prime is 1320312233. The reversal of 1320312225 is 5222130231.

It is not a de Polignac number, because 1320312225 - 2² = 1320312221 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1320312221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 204649 + ... + 211001.

It is an arithmetic number, because the mean of its divisors is an integer number (48455604).

Almost surely, 2^1320312225 is an apocalyptic number.

1320312225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1320312225 is a deficient number, since it is larger than the sum of its proper divisors (1005556767).

1320312225 is a wasteful number, since it uses less digits than its factorization.

1320312225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6546 (or 6541 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1320312225 is about 36336.1008502563. The cubic root of 1320312225 is about 1097.0477932503.

Adding to 1320312225 its reverse (5222130231), we get a palindrome (6542442456).

The spelling of 1320312225 in words is "one billion, three hundred twenty million, three hundred twelve thousand, two hundred twenty-five".