12667539 has 4 divisors (see below), whose sum is σ = 16890056. Its totient is φ = 8445024.

The previous prime is 12667537. The next prime is 12667553. The reversal of 12667539 is 93576621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93576621 = 3 ⋅31192207.

It is not a de Polignac number, because 12667539 - 2¹ = 12667537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12667497 and 12667506.

It is not an unprimeable number, because it can be changed into a prime (12667531) 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, 2111254 + ... + 2111259.

It is an arithmetic number, because the mean of its divisors is an integer number (4222514).

Almost surely, 2^12667539 is an apocalyptic number.

12667539 is a deficient number, since it is larger than the sum of its proper divisors (4222517).

12667539 is an equidigital number, since it uses as much as digits as its factorization.

12667539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4222516.

The product of its digits is 68040, while the sum is 39.

The square root of 12667539 is about 3559.1486341540. The cubic root of 12667539 is about 233.1117063387. Note that the first 3 decimals are identical.

The spelling of 12667539 in words is "twelve million, six hundred sixty-seven thousand, five hundred thirty-nine".