12500220 has 24 divisors (see below), whose sum is σ = 35000784. Its totient is φ = 3333376.

The previous prime is 12500197. The next prime is 12500221. The reversal of 12500220 is 2200521.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 12500196 and 12500205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12500221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104109 + ... + 104228.

It is an arithmetic number, because the mean of its divisors is an integer number (1458366).

Almost surely, 2^12500220 is an apocalyptic number.

12500220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12500220 is an abundant number, since it is smaller than the sum of its proper divisors (22500564).

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

12500220 is a wasteful number, since it uses less digits than its factorization.

12500220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208349 (or 208347 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 12500220 is about 3535.5650184942. The cubic root of 12500220 is about 232.0808032054.

Adding to 12500220 its reverse (2200521), we get a palindrome (14700741).

It can be divided in two parts, 12500 and 220, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 12500220 in words is "twelve million, five hundred thousand, two hundred twenty".