26120781 has 6 divisors (see below), whose sum is σ = 37730030. Its totient is φ = 17413848.

The previous prime is 26120771. The next prime is 26120791. The reversal of 26120781 is 18702162.

It is an interprime number because it is at equal distance from previous prime (26120771) and next prime (26120791).

It can be written as a sum of positive squares in only one way, i.e., 25918281 + 202500 = 5091^2 + 450^2 .

It is not a de Polignac number, because 26120781 - 2¹¹ = 26118733 is a prime.

It is a super-2 number, since 2×26120781² = 1364590400099922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26120761) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1451146 + ... + 1451163.

Almost surely, 2^26120781 is an apocalyptic number.

It is an amenable number.

26120781 is a deficient number, since it is larger than the sum of its proper divisors (11609249).

26120781 is a wasteful number, since it uses less digits than its factorization.

26120781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2902315 (or 2902312 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 26120781 is about 5110.8493423305. The cubic root of 26120781 is about 296.7076332491.

The spelling of 26120781 in words is "twenty-six million, one hundred twenty thousand, seven hundred eighty-one".