12272399 has 4 divisors (see below), whose sum is σ = 12305160. Its totient is φ = 12239640.

The previous prime is 12272387. The next prime is 12272401. The reversal of 12272399 is 99327221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99327221 = 7 ⋅14189603.

It is a cyclic number.

It is not a de Polignac number, because 12272399 - 2⁴ = 12272383 is a prime.

It is a super-2 number, since 2×12272399² = 301223554430402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12272599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15812 + ... + 16569.

It is an arithmetic number, because the mean of its divisors is an integer number (3076290).

Almost surely, 2^12272399 is an apocalyptic number.

12272399 is a deficient number, since it is larger than the sum of its proper divisors (32761).

12272399 is an equidigital number, since it uses as much as digits as its factorization.

12272399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32760.

The product of its digits is 13608, while the sum is 35.

The square root of 12272399 is about 3503.1983957521. The cubic root of 12272399 is about 230.6622313161.

The spelling of 12272399 in words is "twelve million, two hundred seventy-two thousand, three hundred ninety-nine".