12499220 has 12 divisors (see below), whose sum is σ = 26248404. Its totient is φ = 4999680.

The previous prime is 12499217. The next prime is 12499237. The reversal of 12499220 is 2299421.

It can be written as a sum of positive squares in 2 ways, for example, as 7772944 + 4726276 = 2788^2 + 2174^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312461 + ... + 312500.

It is an arithmetic number, because the mean of its divisors is an integer number (2187367).

Almost surely, 2^12499220 is an apocalyptic number.

12499220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12499220 is an abundant number, since it is smaller than the sum of its proper divisors (13749184).

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

12499220 is a wasteful number, since it uses less digits than its factorization.

12499220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624970 (or 624968 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 12499220 is about 3535.4235955540. The cubic root of 12499220 is about 232.0746143278.

It can be divided in two parts, 124 and 99220, that multiplied together give a triangular number (12303280 = T₄₉₆₀).

The spelling of 12499220 in words is "twelve million, four hundred ninety-nine thousand, two hundred twenty".