15413561 has 2 divisors, whose sum is σ = 15413562. Its totient is φ = 15413560.

The previous prime is 15413521. The next prime is 15413569. The reversal of 15413561 is 16531451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8231161 + 7182400 = 2869^2 + 2680^2 .

It is a cyclic number.

It is not a de Polignac number, because 15413561 - 2¹⁴ = 15397177 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15413561.

It is not a weakly prime, because it can be changed into another prime (15413569) 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 as a sum of consecutive naturals, namely, 7706780 + 7706781.

It is an arithmetic number, because the mean of its divisors is an integer number (7706781).

Almost surely, 2^15413561 is an apocalyptic number.

It is an amenable number.

15413561 is a deficient number, since it is larger than the sum of its proper divisors (1).

15413561 is an equidigital number, since it uses as much as digits as its factorization.

15413561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 26.

The square root of 15413561 is about 3926.0108252525. The cubic root of 15413561 is about 248.8672001441.

The spelling of 15413561 in words is "fifteen million, four hundred thirteen thousand, five hundred sixty-one".