12778195 has 4 divisors (see below), whose sum is σ = 15333840. Its totient is φ = 10222552.

The previous prime is 12778189. The next prime is 12778201. The reversal of 12778195 is 59187721.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12778189) and next prime (12778201).

It is a cyclic number.

It is not a de Polignac number, because 12778195 - 2³ = 12778187 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1277815 + ... + 1277824.

It is an arithmetic number, because the mean of its divisors is an integer number (3833460).

Almost surely, 2^12778195 is an apocalyptic number.

12778195 is a deficient number, since it is larger than the sum of its proper divisors (2555645).

12778195 is an equidigital number, since it uses as much as digits as its factorization.

12778195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2555644.

The product of its digits is 35280, while the sum is 40.

The square root of 12778195 is about 3574.6601237041. The cubic root of 12778195 is about 233.7885139623.

The spelling of 12778195 in words is "twelve million, seven hundred seventy-eight thousand, one hundred ninety-five".