26242409 has 2 divisors, whose sum is σ = 26242410. Its totient is φ = 26242408.

The previous prime is 26242397. The next prime is 26242429. The reversal of 26242409 is 90424262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21949225 + 4293184 = 4685^2 + 2072^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26242409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26242429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13121204 + 13121205.

It is an arithmetic number, because the mean of its divisors is an integer number (13121205).

Almost surely, 2^26242409 is an apocalyptic number.

It is an amenable number.

26242409 is a deficient number, since it is larger than the sum of its proper divisors (1).

26242409 is an equidigital number, since it uses as much as digits as its factorization.

26242409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 26242409 is about 5122.7345236700. The cubic root of 26242409 is about 297.1674470594.

The spelling of 26242409 in words is "twenty-six million, two hundred forty-two thousand, four hundred nine".