12197378 has 8 divisors (see below), whose sum is σ = 18351372. Its totient is φ = 6080256.

The previous prime is 12197369. The next prime is 12197399. The reversal of 12197378 is 87379121.

It can be written as a sum of positive squares in 2 ways, for example, as 10936249 + 1261129 = 3307^2 + 1123^2 .

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

It is a Curzon 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, 8375 + ... + 9722.

Almost surely, 2^12197378 is an apocalyptic number.

12197378 is a deficient number, since it is larger than the sum of its proper divisors (6153994).

12197378 is a wasteful number, since it uses less digits than its factorization.

12197378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18436.

The product of its digits is 21168, while the sum is 38.

The square root of 12197378 is about 3492.4744809375. The cubic root of 12197378 is about 230.1912586823.

The spelling of 12197378 in words is "twelve million, one hundred ninety-seven thousand, three hundred seventy-eight".