12720273 has 4 divisors (see below), whose sum is σ = 16960368. Its totient is φ = 8480180.

The previous prime is 12720271. The next prime is 12720283. The reversal of 12720273 is 37202721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37202721 = 3 ⋅12400907.

It is a cyclic number.

It is not a de Polignac number, because 12720273 - 2¹ = 12720271 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12720271) 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, 2120043 + ... + 2120048.

It is an arithmetic number, because the mean of its divisors is an integer number (4240092).

Almost surely, 2^12720273 is an apocalyptic number.

It is an amenable number.

12720273 is a deficient number, since it is larger than the sum of its proper divisors (4240095).

12720273 is an equidigital number, since it uses as much as digits as its factorization.

12720273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4240094.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 12720273 is about 3566.5491725196. The cubic root of 12720273 is about 233.4347339321.

Adding to 12720273 its reverse (37202721), we get a palindrome (49922994).

The spelling of 12720273 in words is "twelve million, seven hundred twenty thousand, two hundred seventy-three".