24975521 has 2 divisors, whose sum is σ = 24975522. Its totient is φ = 24975520.

The previous prime is 24975421. The next prime is 24975527. The reversal of 24975521 is 12557942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20611600 + 4363921 = 4540^2 + 2089^2 .

It is a cyclic number.

It is not a de Polignac number, because 24975521 - 2¹⁰ = 24974497 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (24975527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12487760 + 12487761.

It is an arithmetic number, because the mean of its divisors is an integer number (12487761).

Almost surely, 2^24975521 is an apocalyptic number.

It is an amenable number.

24975521 is a deficient number, since it is larger than the sum of its proper divisors (1).

24975521 is an equidigital number, since it uses as much as digits as its factorization.

24975521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 35.

The square root of 24975521 is about 4997.5515004850. The cubic root of 24975521 is about 292.3063066150.

The spelling of 24975521 in words is "twenty-four million, nine hundred seventy-five thousand, five hundred twenty-one".