26540131 has 4 divisors (see below), whose sum is σ = 27937000. Its totient is φ = 25143264.

The previous prime is 26540117. The next prime is 26540177. The reversal of 26540131 is 13104562.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26540131 is a prime.

It is a super-2 number, since 2×26540131² = 1408757106994322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26540531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698406 + ... + 698443.

It is an arithmetic number, because the mean of its divisors is an integer number (6984250).

Almost surely, 2^26540131 is an apocalyptic number.

26540131 is a deficient number, since it is larger than the sum of its proper divisors (1396869).

26540131 is a wasteful number, since it uses less digits than its factorization.

26540131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396868.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 26540131 is about 5151.7114631936. The cubic root of 26540131 is about 298.2870190858.

Adding to 26540131 its reverse (13104562), we get a palindrome (39644693).

The spelling of 26540131 in words is "twenty-six million, five hundred forty thousand, one hundred thirty-one".