12249890 has 32 divisors (see below), whose sum is σ = 23269680. Its totient is φ = 4635904.

The previous prime is 12249847. The next prime is 12249907. The reversal of 12249890 is 9894221.

It can be written as a sum of positive squares in 8 ways, for example, as 6713281 + 5536609 = 2591^2 + 2353^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12249890.

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 15 ways as a sum of consecutive naturals, for example, 14972 + ... + 15768.

Almost surely, 2^12249890 is an apocalyptic number.

12249890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12249890 is a deficient number, since it is larger than the sum of its proper divisors (11019790).

12249890 is a wasteful number, since it uses less digits than its factorization.

12249890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 12249890 is about 3499.9842856790. The cubic root of 12249890 is about 230.5211246036.

The spelling of 12249890 in words is "twelve million, two hundred forty-nine thousand, eight hundred ninety".