13125569 has 2 divisors, whose sum is σ = 13125570. Its totient is φ = 13125568.

The previous prime is 13125551. The next prime is 13125611. The reversal of 13125569 is 96552131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9684544 + 3441025 = 3112^2 + 1855^2 .

It is a cyclic number.

It is not a de Polignac number, because 13125569 - 2¹² = 13121473 is a prime.

It is a super-2 number, since 2×13125569² = 344561123147522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13125509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6562784 + 6562785.

It is an arithmetic number, because the mean of its divisors is an integer number (6562785).

Almost surely, 2^13125569 is an apocalyptic number.

It is an amenable number.

13125569 is a deficient number, since it is larger than the sum of its proper divisors (1).

13125569 is an equidigital number, since it uses as much as digits as its factorization.

13125569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 32.

The square root of 13125569 is about 3622.9227151569. The cubic root of 13125569 is about 235.8881076877. Note that the first 3 decimals are identical.

The spelling of 13125569 in words is "thirteen million, one hundred twenty-five thousand, five hundred sixty-nine".