26164421 has 2 divisors, whose sum is σ = 26164422. Its totient is φ = 26164420.

The previous prime is 26164393. The next prime is 26164427. The reversal of 26164421 is 12446162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25867396 + 297025 = 5086^2 + 545^2 .

It is a cyclic number.

It is not a de Polignac number, because 26164421 - 2⁶ = 26164357 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26164427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13082210 + 13082211.

It is an arithmetic number, because the mean of its divisors is an integer number (13082211).

Almost surely, 2^26164421 is an apocalyptic number.

It is an amenable number.

26164421 is a deficient number, since it is larger than the sum of its proper divisors (1).

26164421 is an equidigital number, since it uses as much as digits as its factorization.

26164421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 26.

The square root of 26164421 is about 5115.1169097099. The cubic root of 26164421 is about 296.8727778375.

The spelling of 26164421 in words is "twenty-six million, one hundred sixty-four thousand, four hundred twenty-one".