12249999 has 12 divisors (see below), whose sum is σ = 17745000. Its totient is φ = 8143344.

The previous prime is 12249989. The next prime is 12250009. The reversal of 12249999 is 99994221.

It is a Cunningham number, because it is equal to 3500²-1.

It is an interprime number because it is at equal distance from previous prime (12249989) and next prime (12250009).

It is not a de Polignac number, because 12249999 - 2⁴ = 12249983 is a prime.

12249999 is a modest number, since divided by 9999 gives 1224 as remainder.

It is a plaindrome in base 5 and base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12249949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1752 + ... + 5250.

It is an arithmetic number, because the mean of its divisors is an integer number (1478750).

Almost surely, 2^12249999 is an apocalyptic number.

12249999 is a deficient number, since it is larger than the sum of its proper divisors (5495001).

12249999 is a wasteful number, since it uses less digits than its factorization.

12249999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3894 (or 3891 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 12249999 is about 3499.9998571429. Note that the first 3 decimals coincide. The cubic root of 12249999 is about 230.5218083302.

It can be divided in two parts, 1 and 2249999, that added together give a square (2250000 = 1500²).

The spelling of 12249999 in words is "twelve million, two hundred forty-nine thousand, nine hundred ninety-nine".