15124561 has 2 divisors, whose sum is σ = 15124562. Its totient is φ = 15124560.

The previous prime is 15124511. The next prime is 15124579. The reversal of 15124561 is 16542151.

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., 10523536 + 4601025 = 3244^2 + 2145^2 .

It is a cyclic number.

It is not a de Polignac number, because 15124561 - 2¹³ = 15116369 is a prime.

It is not a weakly prime, because it can be changed into another prime (15124511) 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, 7562280 + 7562281.

It is an arithmetic number, because the mean of its divisors is an integer number (7562281).

Almost surely, 2^15124561 is an apocalyptic number.

It is an amenable number.

15124561 is a deficient number, since it is larger than the sum of its proper divisors (1).

15124561 is an equidigital number, since it uses as much as digits as its factorization.

15124561 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 15124561 is about 3889.0308561388. The cubic root of 15124561 is about 247.3019794865.

The spelling of 15124561 in words is "fifteen million, one hundred twenty-four thousand, five hundred sixty-one".