12273140 has 24 divisors (see below), whose sum is σ = 28117152. Its totient is φ = 4462880.

The previous prime is 12273109. The next prime is 12273143. The reversal of 12273140 is 4137221.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12273143) 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, 27674 + ... + 28113.

It is an arithmetic number, because the mean of its divisors is an integer number (1171548).

Almost surely, 2^12273140 is an apocalyptic number.

12273140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12273140 is an abundant number, since it is smaller than the sum of its proper divisors (15844012).

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

12273140 is a wasteful number, since it uses less digits than its factorization.

12273140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55807 (or 55805 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 12273140 is about 3503.3041546517. The cubic root of 12273140 is about 230.6668736378. Note that the first 3 decimals are identical.

The spelling of 12273140 in words is "twelve million, two hundred seventy-three thousand, one hundred forty".