12780371 has 4 divisors (see below), whose sum is σ = 12792000. Its totient is φ = 12768744.

The previous prime is 12780349. The next prime is 12780373. The reversal of 12780371 is 17308721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17308721 = 547 ⋅31643.

It is a cyclic number.

It is not a de Polignac number, because 12780371 - 2⁶ = 12780307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12780373) 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, 3971 + ... + 6428.

It is an arithmetic number, because the mean of its divisors is an integer number (3198000).

Almost surely, 2^12780371 is an apocalyptic number.

12780371 is a deficient number, since it is larger than the sum of its proper divisors (11629).

12780371 is a wasteful number, since it uses less digits than its factorization.

12780371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11628.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 12780371 is about 3574.9644753480. The cubic root of 12780371 is about 233.8017838316.

The spelling of 12780371 in words is "twelve million, seven hundred eighty thousand, three hundred seventy-one".