23005261 has 2 divisors, whose sum is σ = 23005262. Its totient is φ = 23005260.

The previous prime is 23005249. The next prime is 23005289. The reversal of 23005261 is 16250032.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12075625 + 10929636 = 3475^2 + 3306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23005261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23005291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11502630 + 11502631.

It is an arithmetic number, because the mean of its divisors is an integer number (11502631).

Almost surely, 2^23005261 is an apocalyptic number.

It is an amenable number.

23005261 is a deficient number, since it is larger than the sum of its proper divisors (1).

23005261 is an equidigital number, since it uses as much as digits as its factorization.

23005261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 23005261 is about 4796.3799891168. The cubic root of 23005261 is about 284.4083797874.

Adding to 23005261 its reverse (16250032), we get a palindrome (39255293).

The spelling of 23005261 in words is "twenty-three million, five thousand, two hundred sixty-one".