25412209 has 2 divisors, whose sum is σ = 25412210. Its totient is φ = 25412208.

The previous prime is 25412201. The next prime is 25412221. The reversal of 25412209 is 90221452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25401600 + 10609 = 5040^2 + 103^2 .

It is a cyclic number.

It is not a de Polignac number, because 25412209 - 2³ = 25412201 is a prime.

It is not a weakly prime, because it can be changed into another prime (25412201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12706104 + 12706105.

It is an arithmetic number, because the mean of its divisors is an integer number (12706105).

Almost surely, 2^25412209 is an apocalyptic number.

It is an amenable number.

25412209 is a deficient number, since it is larger than the sum of its proper divisors (1).

25412209 is an equidigital number, since it uses as much as digits as its factorization.

25412209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 25412209 is about 5041.0523702894. The cubic root of 25412209 is about 294.0000964104. Note that the first 4 decimals are identical.

Subtracting from 25412209 its sum of digits (25), we obtain a cube (25412184 = 294³).

The spelling of 25412209 in words is "twenty-five million, four hundred twelve thousand, two hundred nine".