12149523 has 6 divisors (see below), whose sum is σ = 17549324. Its totient is φ = 8099676.

The previous prime is 12149519. The next prime is 12149539. The reversal of 12149523 is 32594121.

12149523 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12149523 - 2² = 12149519 is a prime.

It is a super-2 number, since 2×12149523² = 295221818255058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12149513) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 674965 + ... + 674982.

Almost surely, 2^12149523 is an apocalyptic number.

12149523 is a deficient number, since it is larger than the sum of its proper divisors (5399801).

12149523 is a wasteful number, since it uses less digits than its factorization.

12149523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349953 (or 1349950 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 12149523 is about 3485.6165882093. The cubic root of 12149523 is about 229.8898212046.

The spelling of 12149523 in words is "twelve million, one hundred forty-nine thousand, five hundred twenty-three".