12277143 has 8 divisors (see below), whose sum is σ = 18188400. Its totient is φ = 8184744.

The previous prime is 12277129. The next prime is 12277151. The reversal of 12277143 is 34177221.

It is a happy number.

It is not a de Polignac number, because 12277143 - 2⁴ = 12277127 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 454709 = 12277143 / (1 + 2 + 2 + 7 + 7 + 1 + 4 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12277183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227328 + ... + 227381.

It is an arithmetic number, because the mean of its divisors is an integer number (2273550).

Almost surely, 2^12277143 is an apocalyptic number.

12277143 is a deficient number, since it is larger than the sum of its proper divisors (5911257).

12277143 is an equidigital number, since it uses as much as digits as its factorization.

12277143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454718 (or 454712 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 12277143 is about 3503.8754258678. The cubic root of 12277143 is about 230.6919489683.

The spelling of 12277143 in words is "twelve million, two hundred seventy-seven thousand, one hundred forty-three".