26135381 has 2 divisors, whose sum is σ = 26135382. Its totient is φ = 26135380.

The previous prime is 26135371. The next prime is 26135411. The reversal of 26135381 is 18353162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13468900 + 12666481 = 3670^2 + 3559^2 .

It is a cyclic number.

It is not a de Polignac number, because 26135381 - 2¹⁴ = 26118997 is a prime.

It is a super-2 number, since 2×26135381² = 1366116280030322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26135321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13067690 + 13067691.

It is an arithmetic number, because the mean of its divisors is an integer number (13067691).

Almost surely, 2^26135381 is an apocalyptic number.

It is an amenable number.

26135381 is a deficient number, since it is larger than the sum of its proper divisors (1).

26135381 is an equidigital number, since it uses as much as digits as its factorization.

26135381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 26135381 is about 5112.2774768199. The cubic root of 26135381 is about 296.7629037327.

The spelling of 26135381 in words is "twenty-six million, one hundred thirty-five thousand, three hundred eighty-one".