12272140 has 12 divisors (see below), whose sum is σ = 25771536. Its totient is φ = 4908848.

The previous prime is 12272129. The next prime is 12272159. The reversal of 12272140 is 4127221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306784 + ... + 306823.

It is an arithmetic number, because the mean of its divisors is an integer number (2147628).

Almost surely, 2^12272140 is an apocalyptic number.

12272140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12272140 is an abundant number, since it is smaller than the sum of its proper divisors (13499396).

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

12272140 is a wasteful number, since it uses less digits than its factorization.

12272140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613616 (or 613614 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 12272140 is about 3503.1614293378. The cubic root of 12272140 is about 230.6606086521.

Adding to 12272140 its reverse (4127221), we get a palindrome (16399361).

The spelling of 12272140 in words is "twelve million, two hundred seventy-two thousand, one hundred forty".