26455139 has 2 divisors, whose sum is σ = 26455140. Its totient is φ = 26455138.

The previous prime is 26455081. The next prime is 26455147. The reversal of 26455139 is 93155462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26455139 - 2¹⁶ = 26389603 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 26455099 and 26455108.

It is not a weakly prime, because it can be changed into another prime (26455189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13227569 + 13227570.

It is an arithmetic number, because the mean of its divisors is an integer number (13227570).

Almost surely, 2^26455139 is an apocalyptic number.

26455139 is a deficient number, since it is larger than the sum of its proper divisors (1).

26455139 is an equidigital number, since it uses as much as digits as its factorization.

26455139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 35.

The square root of 26455139 is about 5143.4559393466. The cubic root of 26455139 is about 297.9682675699.

The spelling of 26455139 in words is "twenty-six million, four hundred fifty-five thousand, one hundred thirty-nine".