12149399 has 4 divisors (see below), whose sum is σ = 12161664. Its totient is φ = 12137136.

The previous prime is 12149393. The next prime is 12149411. The reversal of 12149399 is 99394121.

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 12149399 - 2⁴ = 12149383 is a prime.

It is a super-2 number, since 2×12149399² = 295215792122402, 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 (12149393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4502 + ... + 6675.

It is an arithmetic number, because the mean of its divisors is an integer number (3040416).

Almost surely, 2^12149399 is an apocalyptic number.

12149399 is a deficient number, since it is larger than the sum of its proper divisors (12265).

12149399 is a wasteful number, since it uses less digits than its factorization.

12149399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12264.

The product of its digits is 17496, while the sum is 38.

The square root of 12149399 is about 3485.5988007801. The cubic root of 12149399 is about 229.8890391044.

The spelling of 12149399 in words is "twelve million, one hundred forty-nine thousand, three hundred ninety-nine".