12273156 has 72 divisors (see below), whose sum is σ = 35852544. Its totient is φ = 3467520.

The previous prime is 12273143. The next prime is 12273169. The reversal of 12273156 is 65137221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12273143) and next prime (12273169).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28261 + ... + 28691.

It is an arithmetic number, because the mean of its divisors is an integer number (497952).

Almost surely, 2^12273156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12273156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17926272).

12273156 is an abundant number, since it is smaller than the sum of its proper divisors (23579388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12273156 is a wasteful number, since it uses less digits than its factorization.

12273156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561 (or 556 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 12273156 is about 3503.3064382095. The cubic root of 12273156 is about 230.6669738748. Note that the first 3 decimals are identical.

The spelling of 12273156 in words is "twelve million, two hundred seventy-three thousand, one hundred fifty-six".