1313720325 has 144 divisors (see below), whose sum is σ = 2674114560. Its totient is φ = 613008000.

The previous prime is 1313720321. The next prime is 1313720333. The reversal of 1313720325 is 5230273131.

1313720325 is a `hidden beast` number, since 1 + 313 + 7 + 20 + 325 = 666.

It is not a de Polignac number, because 1313720325 - 2² = 1313720321 is a prime.

It is a super-2 number, since 2×1313720325² = 3451722184636211250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313720321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3047860 + ... + 3048290.

It is an arithmetic number, because the mean of its divisors is an integer number (18570240).

Almost surely, 2^1313720325 is an apocalyptic number.

1313720325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1313720325 is an abundant number, since it is smaller than the sum of its proper divisors (1360394235).

1313720325 is a wasteful number, since it uses less digits than its factorization.

1313720325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 1313720325 is about 36245.2800375442. The cubic root of 1313720325 is about 1095.2190091740.

Adding to 1313720325 its reverse (5230273131), we get a palindrome (6543993456).

The spelling of 1313720325 in words is "one billion, three hundred thirteen million, seven hundred twenty thousand, three hundred twenty-five".