2255609 has 2 divisors, whose sum is σ = 2255610. Its totient is φ = 2255608.

The previous prime is 2255581. The next prime is 2255621. The reversal of 2255609 is 9065522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2111209 + 144400 = 1453^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 2255609 - 2²⁰ = 1207033 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p₁₆₆₄₅₇ and since 2255609 and 166457 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (2255639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1127804 + 1127805.

It is an arithmetic number, because the mean of its divisors is an integer number (1127805).

2^2255609 is an apocalyptic number.

It is an amenable number.

2255609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2255609 is an equidigital number, since it uses as much as digits as its factorization.

2255609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 2255609 is about 1501.8685028990. The cubic root of 2255609 is about 131.1458663062.

The spelling of 2255609 in words is "two million, two hundred fifty-five thousand, six hundred nine".