26542891 has 4 divisors (see below), whose sum is σ = 26712112. Its totient is φ = 26373672.

The previous prime is 26542889. The next prime is 26542903. The reversal of 26542891 is 19824562.

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

It is a cyclic number.

It is not a de Polignac number, because 26542891 - 2¹ = 26542889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26542891.

It is not an unprimeable number, because it can be changed into a prime (26542811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84375 + ... + 84688.

It is an arithmetic number, because the mean of its divisors is an integer number (6678028).

Almost surely, 2^26542891 is an apocalyptic number.

26542891 is a deficient number, since it is larger than the sum of its proper divisors (169221).

26542891 is a wasteful number, since it uses less digits than its factorization.

26542891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169220.

The product of its digits is 34560, while the sum is 37.

The square root of 26542891 is about 5151.9793283747. The cubic root of 26542891 is about 298.2973586936.

The spelling of 26542891 in words is "twenty-six million, five hundred forty-two thousand, eight hundred ninety-one".