12140797 has 4 divisors (see below), whose sum is σ = 12436956. Its totient is φ = 11844640.

The previous prime is 12140759. The next prime is 12140813. The reversal of 12140797 is 79704121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79704121 = 7 ⋅11386303.

It can be written as a sum of positive squares in 2 ways, for example, as 1454436 + 10686361 = 1206^2 + 3269^2 .

It is a cyclic number.

It is not a de Polignac number, because 12140797 - 2¹⁹ = 11616509 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12141797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148018 + ... + 148099.

It is an arithmetic number, because the mean of its divisors is an integer number (3109239).

Almost surely, 2^12140797 is an apocalyptic number.

It is an amenable number.

12140797 is a deficient number, since it is larger than the sum of its proper divisors (296159).

12140797 is an equidigital number, since it uses as much as digits as its factorization.

12140797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296158.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 12140797 is about 3484.3646479667. The cubic root of 12140797 is about 229.8347710592.

The spelling of 12140797 in words is "twelve million, one hundred forty thousand, seven hundred ninety-seven".