12499420 has 48 divisors (see below), whose sum is σ = 28153440. Its totient is φ = 4644864.

The previous prime is 12499381. The next prime is 12499439. The reversal of 12499420 is 2499421.

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 15 ways as a sum of consecutive naturals, for example, 32791 + ... + 33169.

It is an arithmetic number, because the mean of its divisors is an integer number (586530).

Almost surely, 2^12499420 is an apocalyptic number.

12499420 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 12499420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14076720).

12499420 is an abundant number, since it is smaller than the sum of its proper divisors (15654020).

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

12499420 is a wasteful number, since it uses less digits than its factorization.

12499420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 500 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 12499420 is about 3535.4518805946. The cubic root of 12499420 is about 232.0758521298.

Subtracting from 12499420 its reverse (2499421), we obtain a palindrome (9999999).

The spelling of 12499420 in words is "twelve million, four hundred ninety-nine thousand, four hundred twenty".