26104021 has 4 divisors (see below), whose sum is σ = 26114272. Its totient is φ = 26093772.

The previous prime is 26104007. The next prime is 26104051. The reversal of 26104021 is 12040162.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 26104021 - 2¹¹ = 26101973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26103986 and 26104004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26104051) 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, 1960 + ... + 7486.

It is an arithmetic number, because the mean of its divisors is an integer number (6528568).

Almost surely, 2^26104021 is an apocalyptic number.

It is an amenable number.

26104021 is a deficient number, since it is larger than the sum of its proper divisors (10251).

26104021 is an equidigital number, since it uses as much as digits as its factorization.

26104021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10250.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 26104021 is about 5109.2094300391. The cubic root of 26104021 is about 296.6441603653.

Subtracting from 26104021 its product of nonzero digits (96), we obtain a triangular number (26103925 = T₇₂₂₅).

Adding to 26104021 its reverse (12040162), we get a palindrome (38144183).

The spelling of 26104021 in words is "twenty-six million, one hundred four thousand, twenty-one".