12227391 has 24 divisors (see below), whose sum is σ = 19455696. Its totient is φ = 7338240.

The previous prime is 12227377. The next prime is 12227419. The reversal of 12227391 is 19372221.

It is not a de Polignac number, because 12227391 - 2⁵ = 12227359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12227291) 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, 10641 + ... + 11733.

It is an arithmetic number, because the mean of its divisors is an integer number (810654).

Almost surely, 2^12227391 is an apocalyptic number.

12227391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12227391 is a deficient number, since it is larger than the sum of its proper divisors (7228305).

12227391 is a wasteful number, since it uses less digits than its factorization.

12227391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223 (or 1220 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 12227391 is about 3496.7686511978. The cubic root of 12227391 is about 230.3799077350.

The spelling of 12227391 in words is "twelve million, two hundred twenty-seven thousand, three hundred ninety-one".