26140631 has 4 divisors (see below), whose sum is σ = 28517064. Its totient is φ = 23764200.

The previous prime is 26140589. The next prime is 26140633. The reversal of 26140631 is 13604162.

It is a happy number.

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-26140631 is a prime.

It is a super-2 number, since 2×26140631² = 1366665178156322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26140597 and 26140606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26140633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1188200 + ... + 1188221.

It is an arithmetic number, because the mean of its divisors is an integer number (7129266).

Almost surely, 2^26140631 is an apocalyptic number.

26140631 is a deficient number, since it is larger than the sum of its proper divisors (2376433).

26140631 is a wasteful number, since it uses less digits than its factorization.

26140631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376432.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 26140631 is about 5112.7909208181. The cubic root of 26140631 is about 296.7827733612.

Adding to 26140631 its reverse (13604162), we get a palindrome (39744793).

The spelling of 26140631 in words is "twenty-six million, one hundred forty thousand, six hundred thirty-one".