12782397 has 4 divisors (see below), whose sum is σ = 17043200. Its totient is φ = 8521596.

The previous prime is 12782377. The next prime is 12782431. The reversal of 12782397 is 79328721.

12782397 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 Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12782397 - 2⁶ = 12782333 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 (12782377) 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, 2130397 + ... + 2130402.

It is an arithmetic number, because the mean of its divisors is an integer number (4260800).

Almost surely, 2^12782397 is an apocalyptic number.

It is an amenable number.

12782397 is a deficient number, since it is larger than the sum of its proper divisors (4260803).

12782397 is an equidigital number, since it uses as much as digits as its factorization.

12782397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4260802.

The product of its digits is 42336, while the sum is 39.

The square root of 12782397 is about 3575.2478235781. The cubic root of 12782397 is about 233.8141376041.

The spelling of 12782397 in words is "twelve million, seven hundred eighty-two thousand, three hundred ninety-seven".