12420743 has 4 divisors (see below), whose sum is σ = 12466848. Its totient is φ = 12374640.

The previous prime is 12420721. The next prime is 12420757. The reversal of 12420743 is 34702421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34702421 = 13 ⋅2669417.

It is a cyclic number.

It is not a de Polignac number, because 12420743 - 2⁸ = 12420487 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 (12420703) 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, 22646 + ... + 23187.

It is an arithmetic number, because the mean of its divisors is an integer number (3116712).

Almost surely, 2^12420743 is an apocalyptic number.

12420743 is a deficient number, since it is larger than the sum of its proper divisors (46105).

12420743 is an equidigital number, since it uses as much as digits as its factorization.

12420743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46104.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 12420743 is about 3524.3074496985. The cubic root of 12420743 is about 231.5878967806.

The spelling of 12420743 in words is "twelve million, four hundred twenty thousand, seven hundred forty-three".