26405213 has 2 divisors, whose sum is σ = 26405214. Its totient is φ = 26405212.

The previous prime is 26405179. The next prime is 26405227. The reversal of 26405213 is 31250462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24970009 + 1435204 = 4997^2 + 1198^2 .

It is a cyclic number.

It is not a de Polignac number, because 26405213 - 2²⁰ = 25356637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26401213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13202606 + 13202607.

It is an arithmetic number, because the mean of its divisors is an integer number (13202607).

Almost surely, 2^26405213 is an apocalyptic number.

It is an amenable number.

26405213 is a deficient number, since it is larger than the sum of its proper divisors (1).

26405213 is an equidigital number, since it uses as much as digits as its factorization.

26405213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 26405213 is about 5138.6002958004. The cubic root of 26405213 is about 297.7807081477.

Adding to 26405213 its reverse (31250462), we get a palindrome (57655675).

It can be divided in two parts, 26405 and 213, that multiplied together give a palindrome (5624265).

The spelling of 26405213 in words is "twenty-six million, four hundred five thousand, two hundred thirteen".