12149521 has 8 divisors (see below), whose sum is σ = 12862080. Its totient is φ = 11456592.

The previous prime is 12149519. The next prime is 12149539. The reversal of 12149521 is 12594121.

It is a happy number.

12149521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12149521 - 2¹ = 12149519 is a prime.

It is a super-2 number, since 2×12149521² = 295221721058882, which contains 22 as substring.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (12149021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3625 + ... + 6118.

It is an arithmetic number, because the mean of its divisors is an integer number (1607760).

Almost surely, 2^12149521 is an apocalyptic number.

It is an amenable number.

12149521 is a deficient number, since it is larger than the sum of its proper divisors (712559).

12149521 is an equidigital number, since it uses as much as digits as its factorization.

12149521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9815.

The product of its digits is 720, while the sum is 25.

The square root of 12149521 is about 3485.6163013160. The cubic root of 12149521 is about 229.8898085901.

The spelling of 12149521 in words is "twelve million, one hundred forty-nine thousand, five hundred twenty-one".