26126981 has 2 divisors, whose sum is σ = 26126982. Its totient is φ = 26126980.

The previous prime is 26126953. The next prime is 26126993. The reversal of 26126981 is 18962162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21242881 + 4884100 = 4609^2 + 2210^2 .

It is a cyclic number.

It is not a de Polignac number, because 26126981 - 2¹⁴ = 26110597 is a prime.

It is a super-2 number, since 2×26126981² = 1365238272348722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26126951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13063490 + 13063491.

It is an arithmetic number, because the mean of its divisors is an integer number (13063491).

Almost surely, 2^26126981 is an apocalyptic number.

It is an amenable number.

26126981 is a deficient number, since it is larger than the sum of its proper divisors (1).

26126981 is an equidigital number, since it uses as much as digits as its factorization.

26126981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The square root of 26126981 is about 5111.4558591462. The cubic root of 26126981 is about 296.7311067917.

The spelling of 26126981 in words is "twenty-six million, one hundred twenty-six thousand, nine hundred eighty-one".