1228186 has 4 divisors (see below), whose sum is σ = 1842282. Its totient is φ = 614092.

The previous prime is 1228181. The next prime is 1228187. The reversal of 1228186 is 6818221.

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

It can be written as a sum of positive squares in only one way, i.e., 1092025 + 136161 = 1045^2 + 369^2 .

It is not an unprimeable number, because it can be changed into a prime (1228181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307045 + ... + 307048.

2^1228186 is an apocalyptic number.

1228186 is a deficient number, since it is larger than the sum of its proper divisors (614096).

1228186 is an equidigital number, since it uses as much as digits as its factorization.

1228186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614095.

The product of its digits is 1536, while the sum is 28.

The square root of 1228186 is about 1108.2355345323. The cubic root of 1228186 is about 107.0914291177.

The spelling of 1228186 in words is "one million, two hundred twenty-eight thousand, one hundred eighty-six".