26305421 has 2 divisors, whose sum is σ = 26305422. Its totient is φ = 26305420.

The previous prime is 26305417. The next prime is 26305469. The reversal of 26305421 is 12450362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20376196 + 5929225 = 4514^2 + 2435^2 .

It is a cyclic number.

It is not a de Polignac number, because 26305421 - 2² = 26305417 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 (26305021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13152710 + 13152711.

It is an arithmetic number, because the mean of its divisors is an integer number (13152711).

Almost surely, 2^26305421 is an apocalyptic number.

It is an amenable number.

26305421 is a deficient number, since it is larger than the sum of its proper divisors (1).

26305421 is an equidigital number, since it uses as much as digits as its factorization.

26305421 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 26305421 is about 5128.8810670555. The cubic root of 26305421 is about 297.4051049646.

Adding to 26305421 its reverse (12450362), we get a palindrome (38755783).

The spelling of 26305421 in words is "twenty-six million, three hundred five thousand, four hundred twenty-one".