26172961 has 2 divisors, whose sum is σ = 26172962. Its totient is φ = 26172960.

The previous prime is 26172953. The next prime is 26172967. The reversal of 26172961 is 16927162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25441936 + 731025 = 5044^2 + 855^2 .

It is a cyclic number.

It is not a de Polignac number, because 26172961 - 2³ = 26172953 is a prime.

It is not a weakly prime, because it can be changed into another prime (26172967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13086480 + 13086481.

It is an arithmetic number, because the mean of its divisors is an integer number (13086481).

Almost surely, 2^26172961 is an apocalyptic number.

It is an amenable number.

26172961 is a deficient number, since it is larger than the sum of its proper divisors (1).

26172961 is an equidigital number, since it uses as much as digits as its factorization.

26172961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 26172961 is about 5115.9516221325. The cubic root of 26172961 is about 296.9050738287.

The spelling of 26172961 in words is "twenty-six million, one hundred seventy-two thousand, nine hundred sixty-one".