12390137 has 4 divisors (see below), whose sum is σ = 12593316. Its totient is φ = 12186960.

The previous prime is 12390121. The next prime is 12390151. The reversal of 12390137 is 73109321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73109321 = 19 ⋅3847859.

It can be written as a sum of positive squares in 2 ways, for example, as 2835856 + 9554281 = 1684^2 + 3091^2 .

It is a cyclic number.

It is not a de Polignac number, because 12390137 - 2⁴ = 12390121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12390107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101498 + ... + 101619.

It is an arithmetic number, because the mean of its divisors is an integer number (3148329).

Almost surely, 2^12390137 is an apocalyptic number.

It is an amenable number.

12390137 is a deficient number, since it is larger than the sum of its proper divisors (203179).

12390137 is an equidigital number, since it uses as much as digits as its factorization.

12390137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203178.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 12390137 is about 3519.9626418472. The cubic root of 12390137 is about 231.3975214547.

Adding to 12390137 its reverse (73109321), we get a palindrome (85499458).

The spelling of 12390137 in words is "twelve million, three hundred ninety thousand, one hundred thirty-seven".