12780353 has 6 divisors (see below), whose sum is σ = 12887874. Its totient is φ = 12673536.

The previous prime is 12780349. The next prime is 12780373. The reversal of 12780353 is 35308721.

It can be written as a sum of positive squares in only one way, i.e., 12730624 + 49729 = 3568^2 + 223^2 .

It is not a de Polignac number, because 12780353 - 2² = 12780349 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 (12780323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49601 + ... + 49857.

It is an arithmetic number, because the mean of its divisors is an integer number (2147979).

Almost surely, 2^12780353 is an apocalyptic number.

It is an amenable number.

12780353 is a deficient number, since it is larger than the sum of its proper divisors (107521).

12780353 is an frugal number, since it uses more digits than its factorization.

12780353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 12780353 is about 3574.9619578396. The cubic root of 12780353 is about 233.8016740687.

The spelling of 12780353 in words is "twelve million, seven hundred eighty thousand, three hundred fifty-three".