26211421 has 6 divisors (see below), whose sum is σ = 27401150. Its totient is φ = 25071288.

The previous prime is 26211407. The next prime is 26211439. The reversal of 26211421 is 12411262.

It can be written as a sum of positive squares in only one way, i.e., 25140196 + 1071225 = 5014^2 + 1035^2 .

It is not a de Polignac number, because 26211421 - 2⁷ = 26211293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26211481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24246 + ... + 25303.

Almost surely, 2^26211421 is an apocalyptic number.

It is an amenable number.

26211421 is a deficient number, since it is larger than the sum of its proper divisors (1189729).

26211421 is an equidigital number, since it uses as much as digits as its factorization.

26211421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49595 (or 49572 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 26211421 is about 5119.7090737658. The cubic root of 26211421 is about 297.0504322450.

Adding to 26211421 its reverse (12411262), we get a palindrome (38622683).

The spelling of 26211421 in words is "twenty-six million, two hundred eleven thousand, four hundred twenty-one".