1219985 has 12 divisors (see below), whose sum is σ = 1588188. Its totient is φ = 894336.

The previous prime is 1219963. The next prime is 1219991. The reversal of 1219985 is 5899121.

It can be written as a sum of positive squares in 6 ways, for example, as 38416 + 1181569 = 196^2 + 1087^2 .

It is not a de Polignac number, because 1219985 - 2¹⁶ = 1154449 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8837 + ... + 8973.

It is an arithmetic number, because the mean of its divisors is an integer number (132349).

2^1219985 is an apocalyptic number.

It is an amenable number.

1219985 is a deficient number, since it is larger than the sum of its proper divisors (368203).

1219985 is an equidigital number, since it uses as much as digits as its factorization.

1219985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 155 counting only the distinct ones).

The product of its digits is 6480, while the sum is 35.

The square root of 1219985 is about 1104.5293115169. The cubic root of 1219985 is about 106.8525350911.

The spelling of 1219985 in words is "one million, two hundred nineteen thousand, nine hundred eighty-five".