23726561 has 2 divisors, whose sum is σ = 23726562. Its totient is φ = 23726560.

The previous prime is 23726557. The next prime is 23726569. The reversal of 23726561 is 16562732.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22505536 + 1221025 = 4744^2 + 1105^2 .

It is a cyclic number.

It is not a de Polignac number, because 23726561 - 2² = 23726557 is a prime.

It is not a weakly prime, because it can be changed into another prime (23726569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11863280 + 11863281.

It is an arithmetic number, because the mean of its divisors is an integer number (11863281).

Almost surely, 2^23726561 is an apocalyptic number.

It is an amenable number.

23726561 is a deficient number, since it is larger than the sum of its proper divisors (1).

23726561 is an equidigital number, since it uses as much as digits as its factorization.

23726561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 32.

The square root of 23726561 is about 4870.9917881269. The cubic root of 23726561 is about 287.3502625431.

The spelling of 23726561 in words is "twenty-three million, seven hundred twenty-six thousand, five hundred sixty-one".