24720161 has 2 divisors, whose sum is σ = 24720162. Its totient is φ = 24720160.

The previous prime is 24720149. The next prime is 24720191. The reversal of 24720161 is 16102742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16654561 + 8065600 = 4081^2 + 2840^2 .

It is a cyclic number.

It is not a de Polignac number, because 24720161 - 2⁶ = 24720097 is a prime.

It is a super-2 number, since 2×24720161² = 1222172719731842, which contains 22 as substring.

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 (24720191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12360080 + 12360081.

It is an arithmetic number, because the mean of its divisors is an integer number (12360081).

Almost surely, 2^24720161 is an apocalyptic number.

It is an amenable number.

24720161 is a deficient number, since it is larger than the sum of its proper divisors (1).

24720161 is an equidigital number, since it uses as much as digits as its factorization.

24720161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 24720161 is about 4971.9373487605. The cubic root of 24720161 is about 291.3066719710.

The spelling of 24720161 in words is "twenty-four million, seven hundred twenty thousand, one hundred sixty-one".