15241561 has 2 divisors, whose sum is σ = 15241562. Its totient is φ = 15241560.

The previous prime is 15241543. The next prime is 15241573. The reversal of 15241561 is 16514251.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7733961 + 7507600 = 2781^2 + 2740^2 .

It is a cyclic number.

It is not a de Polignac number, because 15241561 - 2¹¹ = 15239513 is a prime.

It is not a weakly prime, because it can be changed into another prime (15241861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7620780 + 7620781.

It is an arithmetic number, because the mean of its divisors is an integer number (7620781).

Almost surely, 2^15241561 is an apocalyptic number.

It is an amenable number.

15241561 is a deficient number, since it is larger than the sum of its proper divisors (1).

15241561 is an equidigital number, since it uses as much as digits as its factorization.

15241561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 25.

The square root of 15241561 is about 3904.0441852008. The cubic root of 15241561 is about 247.9380319071.

The spelling of 15241561 in words is "fifteen million, two hundred forty-one thousand, five hundred sixty-one".