254642209 has 2 divisors, whose sum is σ = 254642210. Its totient is φ = 254642208.

The previous prime is 254642149. The next prime is 254642221. The reversal of 254642209 is 902246452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205291584 + 49350625 = 14328^2 + 7025^2 .

It is a cyclic number.

It is not a de Polignac number, because 254642209 - 2⁷ = 254642081 is a prime.

It is not a weakly prime, because it can be changed into another prime (254642299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127321104 + 127321105.

It is an arithmetic number, because the mean of its divisors is an integer number (127321105).

Almost surely, 2^254642209 is an apocalyptic number.

It is an amenable number.

254642209 is a deficient number, since it is larger than the sum of its proper divisors (1).

254642209 is an equidigital number, since it uses as much as digits as its factorization.

254642209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 254642209 is about 15957.5126194529. The cubic root of 254642209 is about 633.8358474999.

The spelling of 254642209 in words is "two hundred fifty-four million, six hundred forty-two thousand, two hundred nine".