12138467 has 4 divisors (see below), whose sum is σ = 13241976. Its totient is φ = 11034960.

The previous prime is 12138461. The next prime is 12138481. The reversal of 12138467 is 76483121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12138467 - 2¹² = 12134371 is a prime.

It is a super-2 number, since 2×12138467² = 294684762220178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12138461) 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, 551738 + ... + 551759.

It is an arithmetic number, because the mean of its divisors is an integer number (3310494).

Almost surely, 2^12138467 is an apocalyptic number.

12138467 is a deficient number, since it is larger than the sum of its proper divisors (1103509).

12138467 is a wasteful number, since it uses less digits than its factorization.

12138467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103508.

The product of its digits is 8064, while the sum is 32.

The square root of 12138467 is about 3484.0302811543. The cubic root of 12138467 is about 229.8200672118.

The spelling of 12138467 in words is "twelve million, one hundred thirty-eight thousand, four hundred sixty-seven".