12490309 has 4 divisors (see below), whose sum is σ = 13451116. Its totient is φ = 11529504.

The previous prime is 12490301. The next prime is 12490333. The reversal of 12490309 is 90309421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90309421 = 743 ⋅121547.

It can be written as a sum of positive squares in 2 ways, for example, as 5987809 + 6502500 = 2447^2 + 2550^2 .

It is a cyclic number.

It is not a de Polignac number, because 12490309 - 2³ = 12490301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12490301) by changing a digit.

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, 480384 + ... + 480409.

It is an arithmetic number, because the mean of its divisors is an integer number (3362779).

Almost surely, 2^12490309 is an apocalyptic number.

It is an amenable number.

12490309 is a deficient number, since it is larger than the sum of its proper divisors (960807).

12490309 is an equidigital number, since it uses as much as digits as its factorization.

12490309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960806.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 12490309 is about 3534.1631258333. The cubic root of 12490309 is about 232.0194506582.

The spelling of 12490309 in words is "twelve million, four hundred ninety thousand, three hundred nine".