12145073 has 4 divisors (see below), whose sum is σ = 12152868. Its totient is φ = 12137280.

The previous prime is 12145069. The next prime is 12145093. The reversal of 12145073 is 37054121.

12145073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 37054121 = 13 ⋅2850317.

It can be written as a sum of positive squares in 2 ways, for example, as 7091569 + 5053504 = 2663^2 + 2248^2 .

It is a cyclic number.

It is not a de Polignac number, because 12145073 - 2² = 12145069 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12145013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668 + ... + 4973.

It is an arithmetic number, because the mean of its divisors is an integer number (3038217).

Almost surely, 2^12145073 is an apocalyptic number.

It is an amenable number.

12145073 is a deficient number, since it is larger than the sum of its proper divisors (7795).

12145073 is an equidigital number, since it uses as much as digits as its factorization.

12145073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7794.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 12145073 is about 3484.9781921843. The cubic root of 12145073 is about 229.8617505655.

Adding to 12145073 its reverse (37054121), we get a palindrome (49199194).

The spelling of 12145073 in words is "twelve million, one hundred forty-five thousand, seventy-three".