26391541 has 4 divisors (see below), whose sum is σ = 28790784. Its totient is φ = 23992300.

The previous prime is 26391539. The next prime is 26391613. The reversal of 26391541 is 14519362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26391541 - 2¹ = 26391539 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26391641) 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, 1199605 + ... + 1199626.

It is an arithmetic number, because the mean of its divisors is an integer number (7197696).

Almost surely, 2^26391541 is an apocalyptic number.

It is an amenable number.

26391541 is a deficient number, since it is larger than the sum of its proper divisors (2399243).

26391541 is a wasteful number, since it uses less digits than its factorization.

26391541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2399242.

The product of its digits is 6480, while the sum is 31.

The square root of 26391541 is about 5137.2698001954. The cubic root of 26391541 is about 297.7293046526.

The spelling of 26391541 in words is "twenty-six million, three hundred ninety-one thousand, five hundred forty-one".