1312220325 has 48 divisors (see below), whose sum is σ = 2340475200. Its totient is φ = 644897280.

The previous prime is 1312220323. The next prime is 1312220347. The reversal of 1312220325 is 5230222131.

It is not a de Polignac number, because 1312220325 - 2¹ = 1312220323 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312220321) 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, 1022134 + ... + 1023416.

It is an arithmetic number, because the mean of its divisors is an integer number (48759900).

Almost surely, 2^1312220325 is an apocalyptic number.

1312220325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1312220325 is a deficient number, since it is larger than the sum of its proper divisors (1028254875).

1312220325 is a wasteful number, since it uses less digits than its factorization.

1312220325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358 (or 2353 counting only the distinct ones).

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

The square root of 1312220325 is about 36224.5817781241. The cubic root of 1312220325 is about 1094.8020117006.

Adding to 1312220325 its reverse (5230222131), we get a palindrome (6542442456).

The spelling of 1312220325 in words is "one billion, three hundred twelve million, two hundred twenty thousand, three hundred twenty-five".