24967721 has 2 divisors, whose sum is σ = 24967722. Its totient is φ = 24967720.

The previous prime is 24967687. The next prime is 24967759. The reversal of 24967721 is 12776942.

It is an a-pointer prime, because the next prime (24967759) can be obtained adding 24967721 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18181696 + 6786025 = 4264^2 + 2605^2 .

It is a cyclic number.

It is not a de Polignac number, because 24967721 - 2¹⁴ = 24951337 is a prime.

It is not a weakly prime, because it can be changed into another prime (24967771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12483860 + 12483861.

It is an arithmetic number, because the mean of its divisors is an integer number (12483861).

Almost surely, 2^24967721 is an apocalyptic number.

It is an amenable number.

24967721 is a deficient number, since it is larger than the sum of its proper divisors (1).

24967721 is an equidigital number, since it uses as much as digits as its factorization.

24967721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 38.

The square root of 24967721 is about 4996.7710573930. The cubic root of 24967721 is about 292.2758737953.

The spelling of 24967721 in words is "twenty-four million, nine hundred sixty-seven thousand, seven hundred twenty-one".