12390069 has 4 divisors (see below), whose sum is σ = 16520096. Its totient is φ = 8260044.

The previous prime is 12390041. The next prime is 12390083. The reversal of 12390069 is 96009321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96009321 = 3 ⋅32003107.

It is not a de Polignac number, because 12390069 - 2⁹ = 12389557 is a prime.

It is a super-2 number, since 2×12390069² = 307027619649522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12390019) 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, 2065009 + ... + 2065014.

It is an arithmetic number, because the mean of its divisors is an integer number (4130024).

Almost surely, 2^12390069 is an apocalyptic number.

It is an amenable number.

12390069 is a deficient number, since it is larger than the sum of its proper divisors (4130027).

12390069 is an equidigital number, since it uses as much as digits as its factorization.

12390069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4130026.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 12390069 is about 3519.9529826405. The cubic root of 12390069 is about 231.3970981325.

The spelling of 12390069 in words is "twelve million, three hundred ninety thousand, sixty-nine".