12662147 has 4 divisors (see below), whose sum is σ = 12670680. Its totient is φ = 12653616.

The previous prime is 12662131. The next prime is 12662149. The reversal of 12662147 is 74126621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74126621 = 211 ⋅351311.

It is a cyclic number.

It is not a de Polignac number, because 12662147 - 2⁴ = 12662131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12662149) 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, 1397 + ... + 5222.

It is an arithmetic number, because the mean of its divisors is an integer number (3167670).

Almost surely, 2^12662147 is an apocalyptic number.

12662147 is a deficient number, since it is larger than the sum of its proper divisors (8533).

12662147 is an equidigital number, since it uses as much as digits as its factorization.

12662147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8532.

The product of its digits is 4032, while the sum is 29.

The square root of 12662147 is about 3558.3910690086. The cubic root of 12662147 is about 233.0786265984.

Adding to 12662147 its reverse (74126621), we get a palindrome (86788768).

The spelling of 12662147 in words is "twelve million, six hundred sixty-two thousand, one hundred forty-seven".