26041891 has 4 divisors (see below), whose sum is σ = 26881984. Its totient is φ = 25201800.

The previous prime is 26041879. The next prime is 26041903. The reversal of 26041891 is 19814062.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19814062 = 2 ⋅9907031.

It is an interprime number because it is at equal distance from previous prime (26041879) and next prime (26041903).

It is a cyclic number.

It is not a de Polignac number, because 26041891 - 2⁵ = 26041859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 840061 = 26041891 / (2 + 6 + 0 + 4 + 1 + 8 + 9 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26041811) 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, 420000 + ... + 420061.

It is an arithmetic number, because the mean of its divisors is an integer number (6720496).

Almost surely, 2^26041891 is an apocalyptic number.

26041891 is the 3228-th centered pentagonal number.

26041891 is a deficient number, since it is larger than the sum of its proper divisors (840093).

26041891 is an equidigital number, since it uses as much as digits as its factorization.

26041891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840092.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 26041891 is about 5103.1256108389. The cubic root of 26041891 is about 296.4086264968.

The spelling of 26041891 in words is "twenty-six million, forty-one thousand, eight hundred ninety-one".