24996721 has 2 divisors, whose sum is σ = 24996722. Its totient is φ = 24996720.

The previous prime is 24996701. The next prime is 24996731. The reversal of 24996721 is 12769942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24206400 + 790321 = 4920^2 + 889^2 .

It is a cyclic number.

It is not a de Polignac number, because 24996721 - 2¹⁷ = 24865649 is a prime.

It is not a weakly prime, because it can be changed into another prime (24996701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12498360 + 12498361.

It is an arithmetic number, because the mean of its divisors is an integer number (12498361).

Almost surely, 2^24996721 is an apocalyptic number.

It is an amenable number.

24996721 is a deficient number, since it is larger than the sum of its proper divisors (1).

24996721 is an equidigital number, since it uses as much as digits as its factorization.

24996721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 24996721 is about 4999.6720892475. The cubic root of 24996721 is about 292.3889894568.

The spelling of 24996721 in words is "twenty-four million, nine hundred ninety-six thousand, seven hundred twenty-one".