12142240 has 48 divisors (see below), whose sum is σ = 31298400. Its totient is φ = 4414720.

The previous prime is 12142237. The next prime is 12142261. The reversal of 12142240 is 4224121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1690 + ... + 5209.

It is an arithmetic number, because the mean of its divisors is an integer number (652050).

Almost surely, 2^12142240 is an apocalyptic number.

12142240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12142240 is an abundant number, since it is smaller than the sum of its proper divisors (19156160).

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

12142240 is a wasteful number, since it uses less digits than its factorization.

12142240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6925 (or 6917 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 12142240 is about 3484.5717096940. The cubic root of 12142240 is about 229.8438764042.

Adding to 12142240 its reverse (4224121), we get a palindrome (16366361).

The spelling of 12142240 in words is "twelve million, one hundred forty-two thousand, two hundred forty".