13125321 has 20 divisors (see below), whose sum is σ = 21390864. Its totient is φ = 7954200.

The previous prime is 13125319. The next prime is 13125347. The reversal of 13125321 is 12352131.

13125321 is a `hidden beast` number, since 131 + 2 + 532 + 1 = 666.

It is not a de Polignac number, because 13125321 - 2¹ = 13125319 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13125294 and 13125303.

It is not an unprimeable number, because it can be changed into a prime (13125311) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6475 + ... + 8256.

Almost surely, 2^13125321 is an apocalyptic number.

13125321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13125321 is a deficient number, since it is larger than the sum of its proper divisors (8265543).

13125321 is a wasteful number, since it uses less digits than its factorization.

13125321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14754 (or 14745 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 13125321 is about 3622.8884884854. Note that the first 3 decimals coincide. The cubic root of 13125321 is about 235.8866220221.

Adding to 13125321 its reverse (12352131), we get a palindrome (25477452).

It can be divided in two parts, 131 and 25321, that added together give a palindrome (25452).

The spelling of 13125321 in words is "thirteen million, one hundred twenty-five thousand, three hundred twenty-one".