24724561 has 2 divisors, whose sum is σ = 24724562. Its totient is φ = 24724560.

The previous prime is 24724549. The next prime is 24724571. The reversal of 24724561 is 16542742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12780625 + 11943936 = 3575^2 + 3456^2 .

It is a cyclic number.

It is not a de Polignac number, because 24724561 - 2¹³ = 24716369 is a prime.

It is a super-2 number, since 2×24724561² = 1222607833285442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (24724571) 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, 12362280 + 12362281.

It is an arithmetic number, because the mean of its divisors is an integer number (12362281).

Almost surely, 2^24724561 is an apocalyptic number.

It is an amenable number.

24724561 is a deficient number, since it is larger than the sum of its proper divisors (1).

24724561 is an equidigital number, since it uses as much as digits as its factorization.

24724561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 31.

The square root of 24724561 is about 4972.3798125244. The cubic root of 24724561 is about 291.3239544004.

The spelling of 24724561 in words is "twenty-four million, seven hundred twenty-four thousand, five hundred sixty-one".