26412721 has 2 divisors, whose sum is σ = 26412722. Its totient is φ = 26412720.

The previous prime is 26412719. The next prime is 26412739. The reversal of 26412721 is 12721462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26378496 + 34225 = 5136^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 26412721 - 2¹ = 26412719 is a prime.

Together with 26412719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (26412121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13206360 + 13206361.

It is an arithmetic number, because the mean of its divisors is an integer number (13206361).

Almost surely, 2^26412721 is an apocalyptic number.

It is an amenable number.

26412721 is a deficient number, since it is larger than the sum of its proper divisors (1).

26412721 is an equidigital number, since it uses as much as digits as its factorization.

26412721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 25.

The square root of 26412721 is about 5139.3307930119. The cubic root of 26412721 is about 297.8089289097.

The spelling of 26412721 in words is "twenty-six million, four hundred twelve thousand, seven hundred twenty-one".