26121213 has 6 divisors (see below), whose sum is σ = 37730654. Its totient is φ = 17414136.

The previous prime is 26121211. The next prime is 26121283. The reversal of 26121213 is 31212162.

It can be written as a sum of positive squares in only one way, i.e., 16867449 + 9253764 = 4107^2 + 3042^2 .

It is not a de Polignac number, because 26121213 - 2¹ = 26121211 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 (26121211) 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, 1451170 + ... + 1451187.

Almost surely, 2^26121213 is an apocalyptic number.

It is an amenable number.

26121213 is a deficient number, since it is larger than the sum of its proper divisors (11609441).

26121213 is a wasteful number, since it uses less digits than its factorization.

26121213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2902363 (or 2902360 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 26121213 is about 5110.8916051898. The cubic root of 26121213 is about 296.7092689454.

Adding to 26121213 its reverse (31212162), we get a palindrome (57333375).

The spelling of 26121213 in words is "twenty-six million, one hundred twenty-one thousand, two hundred thirteen".