26136421 has 4 divisors (see below), whose sum is σ = 26190144. Its totient is φ = 26082700.

The previous prime is 26136403. The next prime is 26136427. The reversal of 26136421 is 12463162.

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 26136421 - 2¹⁷ = 26005349 is a prime.

It is a super-2 number, since 2×26136421² = 1366225005378482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26136427) 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, 26125 + ... + 27106.

It is an arithmetic number, because the mean of its divisors is an integer number (6547536).

Almost surely, 2^26136421 is an apocalyptic number.

It is an amenable number.

26136421 is a deficient number, since it is larger than the sum of its proper divisors (53723).

26136421 is an equidigital number, since it uses as much as digits as its factorization.

26136421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53722.

The product of its digits is 1728, while the sum is 25.

The square root of 26136421 is about 5112.3791917267. The cubic root of 26136421 is about 296.7668400229.

Adding to 26136421 its reverse (12463162), we get a palindrome (38599583).

The spelling of 26136421 in words is "twenty-six million, one hundred thirty-six thousand, four hundred twenty-one".