1229985 has 20 divisors (see below), whose sum is σ = 2205588. Its totient is φ = 655776.

The previous prime is 1229981. The next prime is 1229993. The reversal of 1229985 is 5899221.

It can be written as a sum of positive squares in 2 ways, for example, as 762129 + 467856 = 873^2 + 684^2 .

It is not a de Polignac number, because 1229985 - 2² = 1229981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229981) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1114 + ... + 1923.

2^1229985 is an apocalyptic number.

1229985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1229985 is a deficient number, since it is larger than the sum of its proper divisors (975603).

1229985 is an equidigital number, since it uses as much as digits as its factorization.

1229985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3054 (or 3045 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1229985 is about 1109.0468880981. The cubic root of 1229985 is about 107.1436914221.

The spelling of 1229985 in words is "one million, two hundred twenty-nine thousand, nine hundred eighty-five".