1986195 has 16 divisors (see below), whose sum is σ = 3365280. Its totient is φ = 996864.

The previous prime is 1986169. The next prime is 1986199. The reversal of 1986195 is 5916891.

It is not a de Polignac number, because 1986195 - 2⁷ = 1986067 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1986199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3640 + ... + 4149.

It is an arithmetic number, because the mean of its divisors is an integer number (210330).

2^1986195 is an apocalyptic number.

1986195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1986195 is a deficient number, since it is larger than the sum of its proper divisors (1379085).

1986195 is a wasteful number, since it uses less digits than its factorization.

1986195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7814.

The product of its digits is 19440, while the sum is 39.

The square root of 1986195 is about 1409.3243061836. The cubic root of 1986195 is about 125.7015486038.

The spelling of 1986195 in words is "one million, nine hundred eighty-six thousand, one hundred ninety-five".