1381186 has 12 divisors (see below), whose sum is σ = 2187702. Its totient is φ = 653904.

The previous prime is 1381153. The next prime is 1381187. The reversal of 1381186 is 6811831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 938961 + 442225 = 969^2 + 665^2 .

It is not an unprimeable number, because it can be changed into a prime (1381187) 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, 235 + ... + 1678.

2^1381186 is an apocalyptic number.

1381186 is a deficient number, since it is larger than the sum of its proper divisors (806516).

1381186 is a wasteful number, since it uses less digits than its factorization.

1381186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953 (or 1934 counting only the distinct ones).

The product of its digits is 1152, while the sum is 28.

The square root of 1381186 is about 1175.2386991586. The cubic root of 1381186 is about 111.3655131460.

The spelling of 1381186 in words is "one million, three hundred eighty-one thousand, one hundred eighty-six".