12417820 has 24 divisors (see below), whose sum is σ = 27612144. Its totient is φ = 4674816.

The previous prime is 12417791. The next prime is 12417833. The reversal of 12417820 is 2871421.

It is a happy number.

It is a congruent number.

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, 17922 + ... + 18601.

It is an arithmetic number, because the mean of its divisors is an integer number (1150506).

Almost surely, 2^12417820 is an apocalyptic number.

12417820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12417820 is an abundant number, since it is smaller than the sum of its proper divisors (15194324).

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

12417820 is a wasteful number, since it uses less digits than its factorization.

12417820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36549 (or 36547 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 12417820 is about 3523.8927338953. The cubic root of 12417820 is about 231.5697286638.

The spelling of 12417820 in words is "twelve million, four hundred seventeen thousand, eight hundred twenty".