12145797 has 6 divisors (see below), whose sum is σ = 17543942. Its totient is φ = 8097192.

The previous prime is 12145781. The next prime is 12145801. The reversal of 12145797 is 79754121.

It is a happy number.

12145797 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11737476 + 408321 = 3426^2 + 639^2 .

It is not a de Polignac number, because 12145797 - 2⁴ = 12145781 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 (12145597) 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 5 ways as a sum of consecutive naturals, for example, 674758 + ... + 674775.

Almost surely, 2^12145797 is an apocalyptic number.

It is an amenable number.

12145797 is a deficient number, since it is larger than the sum of its proper divisors (5398145).

12145797 is a wasteful number, since it uses less digits than its factorization.

12145797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349539 (or 1349536 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 12145797 is about 3485.0820650309. The cubic root of 12145797 is about 229.8663180308.

The spelling of 12145797 in words is "twelve million, one hundred forty-five thousand, seven hundred ninety-seven".