12145939 has 8 divisors (see below), whose sum is σ = 13849920. Its totient is φ = 10551936.

The previous prime is 12145937. The next prime is 12145981. The reversal of 12145939 is 93954121.

12145939 is digitally balanced in base 2, 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 12145939 - 2¹ = 12145937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12145937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27259 + ... + 27700.

It is an arithmetic number, because the mean of its divisors is an integer number (1731240).

Almost surely, 2^12145939 is an apocalyptic number.

12145939 is a deficient number, since it is larger than the sum of its proper divisors (1703981).

12145939 is a wasteful number, since it uses less digits than its factorization.

12145939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54989.

The product of its digits is 9720, while the sum is 34.

The square root of 12145939 is about 3485.1024375189. The cubic root of 12145939 is about 229.8672138384.

The spelling of 12145939 in words is "twelve million, one hundred forty-five thousand, nine hundred thirty-nine".