12242840 has 64 divisors (see below), whose sum is σ = 29484000. Its totient is φ = 4561920.

The previous prime is 12242807. The next prime is 12242849. The reversal of 12242840 is 4824221.

12242840 = 326² + 327² + ... + 414².

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12242849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67550 + ... + 67730.

Almost surely, 2^12242840 is an apocalyptic number.

12242840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12242840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14742000).

12242840 is an abundant number, since it is smaller than the sum of its proper divisors (17241160).

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

12242840 is a wasteful number, since it uses less digits than its factorization.

12242840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 296 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 12242840 is about 3498.9769933511. The cubic root of 12242840 is about 230.4768933003.

The spelling of 12242840 in words is "twelve million, two hundred forty-two thousand, eight hundred forty".