12272409 has 24 divisors (see below), whose sum is σ = 18712512. Its totient is φ = 7735200.

The previous prime is 12272401. The next prime is 12272431. The reversal of 12272409 is 90427221.

12272409 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12272409 - 2³ = 12272401 is a prime.

It is a super-2 number, since 2×12272409² = 301224045326562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12272401) 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, 20614 + ... + 21200.

It is an arithmetic number, because the mean of its divisors is an integer number (779688).

Almost surely, 2^12272409 is an apocalyptic number.

It is an amenable number.

12272409 is a deficient number, since it is larger than the sum of its proper divisors (6440103).

12272409 is a wasteful number, since it uses less digits than its factorization.

12272409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 12272409 is about 3503.1998230189. The cubic root of 12272409 is about 230.6622939667.

The spelling of 12272409 in words is "twelve million, two hundred seventy-two thousand, four hundred nine".