12149391 has 12 divisors (see below), whose sum is σ = 16402376. Its totient is φ = 7999200.

The previous prime is 12149383. The next prime is 12149393. The reversal of 12149391 is 19394121.

It is not a de Polignac number, because 12149391 - 2³ = 12149383 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 30405 + ... + 30801.

Almost surely, 2^12149391 is an apocalyptic number.

12149391 is a deficient number, since it is larger than the sum of its proper divisors (4252985).

12149391 is an equidigital number, since it uses as much as digits as its factorization.

12149391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602 (or 501 counting only the distinct ones).

The product of its digits is 1944, while the sum is 30.

The square root of 12149391 is about 3485.5976532010. The cubic root of 12149391 is about 229.8889886461. Note that the first 3 decimals are identical.

The spelling of 12149391 in words is "twelve million, one hundred forty-nine thousand, three hundred ninety-one".