24742561 has 2 divisors, whose sum is σ = 24742562. Its totient is φ = 24742560.

The previous prime is 24742559. The next prime is 24742567. The reversal of 24742561 is 16524742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24561936 + 180625 = 4956^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 24742561 - 2¹ = 24742559 is a prime.

It is a super-2 number, since 2×24742561² = 1224388649677442, which contains 22 as substring.

Together with 24742559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (24742567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12371280 + 12371281.

It is an arithmetic number, because the mean of its divisors is an integer number (12371281).

Almost surely, 2^24742561 is an apocalyptic number.

It is an amenable number.

24742561 is a deficient number, since it is larger than the sum of its proper divisors (1).

24742561 is an equidigital number, since it uses as much as digits as its factorization.

24742561 is an evil number, because the sum of its binary digits is even.

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

The square root of 24742561 is about 4974.1894817146. The cubic root of 24742561 is about 291.3946339048.

The spelling of 24742561 in words is "twenty-four million, seven hundred forty-two thousand, five hundred sixty-one".