26261513 has 2 divisors, whose sum is σ = 26261514. Its totient is φ = 26261512.

The previous prime is 26261429. The next prime is 26261567. The reversal of 26261513 is 31516262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26245129 + 16384 = 5123^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 26261513 - 2¹² = 26257417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (26261113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13130756 + 13130757.

It is an arithmetic number, because the mean of its divisors is an integer number (13130757).

Almost surely, 2^26261513 is an apocalyptic number.

It is an amenable number.

26261513 is a deficient number, since it is larger than the sum of its proper divisors (1).

26261513 is an equidigital number, since it uses as much as digits as its factorization.

26261513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 26261513 is about 5124.5988135658. The cubic root of 26261513 is about 297.2395404136.

Adding to 26261513 its reverse (31516262), we get a palindrome (57777775).

The spelling of 26261513 in words is "twenty-six million, two hundred sixty-one thousand, five hundred thirteen".