26145289 has 2 divisors, whose sum is σ = 26145290. Its totient is φ = 26145288.

The previous prime is 26145281. The next prime is 26145299. The reversal of 26145289 is 98254162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22165264 + 3980025 = 4708^2 + 1995^2 .

It is a cyclic number.

It is not a de Polignac number, because 26145289 - 2³ = 26145281 is a prime.

It is a super-2 number, since 2×26145289² = 1367152273787042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26145281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13072644 + 13072645.

It is an arithmetic number, because the mean of its divisors is an integer number (13072645).

Almost surely, 2^26145289 is an apocalyptic number.

It is an amenable number.

26145289 is a deficient number, since it is larger than the sum of its proper divisors (1).

26145289 is an equidigital number, since it uses as much as digits as its factorization.

26145289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 26145289 is about 5113.2464247286. The cubic root of 26145289 is about 296.8004002254.

The spelling of 26145289 in words is "twenty-six million, one hundred forty-five thousand, two hundred eighty-nine".