12390047 has 4 divisors (see below), whose sum is σ = 12817320. Its totient is φ = 11962776.

The previous prime is 12390041. The next prime is 12390083. The reversal of 12390047 is 74009321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74009321 = 43 ⋅1721147.

It is a cyclic number.

It is not a de Polignac number, because 12390047 - 2⁶ = 12389983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12389998 and 12390025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12390041) 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, 213593 + ... + 213650.

It is an arithmetic number, because the mean of its divisors is an integer number (3204330).

Almost surely, 2^12390047 is an apocalyptic number.

12390047 is a deficient number, since it is larger than the sum of its proper divisors (427273).

12390047 is an equidigital number, since it uses as much as digits as its factorization.

12390047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427272.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 12390047 is about 3519.9498575974. The cubic root of 12390047 is about 231.3969611750.

Adding to 12390047 its reverse (74009321), we get a palindrome (86399368).

The spelling of 12390047 in words is "twelve million, three hundred ninety thousand, forty-seven".