12780245 has 8 divisors (see below), whose sum is σ = 15693216. Its totient is φ = 9986256.

The previous prime is 12780223. The next prime is 12780247. The reversal of 12780245 is 54208721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12780245 - 2⁶ = 12780181 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 (12780247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29507 + ... + 29936.

It is an arithmetic number, because the mean of its divisors is an integer number (1961652).

Almost surely, 2^12780245 is an apocalyptic number.

It is an amenable number.

12780245 is a deficient number, since it is larger than the sum of its proper divisors (2912971).

12780245 is an equidigital number, since it uses as much as digits as its factorization.

12780245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59491.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 12780245 is about 3574.9468527518. The cubic root of 12780245 is about 233.8010154887.

Adding to 12780245 its reverse (54208721), we get a palindrome (66988966).

The spelling of 12780245 in words is "twelve million, seven hundred eighty thousand, two hundred forty-five".