12500420 has 24 divisors (see below), whose sum is σ = 26319384. Its totient is φ = 4987136.

The previous prime is 12500419. The next prime is 12500437. The reversal of 12500420 is 2400521.

It can be written as a sum of positive squares in 4 ways, for example, as 1517824 + 10982596 = 1232^2 + 3314^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12500395 and 12500404.

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, 11834 + ... + 12846.

It is an arithmetic number, because the mean of its divisors is an integer number (1096641).

Almost surely, 2^12500420 is an apocalyptic number.

12500420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12500420 is an abundant number, since it is smaller than the sum of its proper divisors (13818964).

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

12500420 is a wasteful number, since it uses less digits than its factorization.

12500420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639 (or 1637 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 12500420 is about 3535.5933024034. The cubic root of 12500420 is about 232.0820409413.

Adding to 12500420 its reverse (2400521), we get a palindrome (14900941).

The spelling of 12500420 in words is "twelve million, five hundred thousand, four hundred twenty".