26012781 has 24 divisors (see below), whose sum is σ = 38525760. Its totient is φ = 16909056.

The previous prime is 26012743. The next prime is 26012837. The reversal of 26012781 is 18721062.

It is not a de Polignac number, because 26012781 - 2⁶ = 26012717 is a prime.

It is a super-2 number, since 2×26012781² = 1353329550707922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26012981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72280 + ... + 72638.

It is an arithmetic number, because the mean of its divisors is an integer number (1605240).

Almost surely, 2^26012781 is an apocalyptic number.

It is an amenable number.

26012781 is a deficient number, since it is larger than the sum of its proper divisors (12512979).

26012781 is a wasteful number, since it uses less digits than its factorization.

26012781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 542 counting only the distinct ones).

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

The square root of 26012781 is about 5100.2726397713. The cubic root of 26012781 is about 296.2981420454.

It can be divided in two parts, 260 and 12781, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 26012781 in words is "twenty-six million, twelve thousand, seven hundred eighty-one".