1229986 has 12 divisors (see below), whose sum is σ = 1886598. Its totient is φ = 601392.

The previous prime is 1229981. The next prime is 1229993. The reversal of 1229986 is 6899221.

It can be written as a sum of positive squares in only one way, i.e., 1010025 + 219961 = 1005^2 + 469^2 .

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 5 ways as a sum of consecutive naturals, for example, 8910 + ... + 9046.

2^1229986 is an apocalyptic number.

1229986 is a deficient number, since it is larger than the sum of its proper divisors (656612).

1229986 is an equidigital number, since it uses as much as digits as its factorization.

1229986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 206 counting only the distinct ones).

The product of its digits is 15552, while the sum is 37.

The square root of 1229986 is about 1109.0473389355. The cubic root of 1229986 is about 107.1437204587.

The spelling of 1229986 in words is "one million, two hundred twenty-nine thousand, nine hundred eighty-six".