25012209 has 16 divisors (see below), whose sum is σ = 34047104. Its totient is φ = 16329600.

The previous prime is 25012193. The next prime is 25012217. The reversal of 25012209 is 90221052.

It is not a de Polignac number, because 25012209 - 2⁴ = 25012193 is a prime.

It is a super-2 number, since 2×25012209² = 1251221198119362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25012279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39324 + ... + 39954.

It is an arithmetic number, because the mean of its divisors is an integer number (2127944).

Almost surely, 2^25012209 is an apocalyptic number.

It is an amenable number.

25012209 is a deficient number, since it is larger than the sum of its proper divisors (9034895).

25012209 is a wasteful number, since it uses less digits than its factorization.

25012209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 25012209 is about 5001.2207509767. The cubic root of 25012209 is about 292.4493651850.

The spelling of 25012209 in words is "twenty-five million, twelve thousand, two hundred nine".