12252009 has 24 divisors (see below), whose sum is σ = 20733408. Its totient is φ = 6363840.

The previous prime is 12251983. The next prime is 12252029. The reversal of 12252009 is 90025221.

It is not a de Polignac number, because 12252009 - 2⁵ = 12251977 is a prime.

It is a super-2 number, since 2×12252009² = 300223449072162, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (12252029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2172 + ... + 5405.

It is an arithmetic number, because the mean of its divisors is an integer number (863892).

Almost surely, 2^12252009 is an apocalyptic number.

It is an amenable number.

12252009 is a deficient number, since it is larger than the sum of its proper divisors (8481399).

12252009 is a wasteful number, since it uses less digits than its factorization.

12252009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7605 (or 7598 counting only the distinct ones).

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

The square root of 12252009 is about 3500.2869882340. The cubic root of 12252009 is about 230.5344157733.

The spelling of 12252009 in words is "twelve million, two hundred fifty-two thousand, nine".