1206985 has 16 divisors (see below), whose sum is σ = 1612800. Its totient is φ = 861120.

The previous prime is 1206979. The next prime is 1207001. The reversal of 1206985 is 5896021.

1206985 = T₃₉ + T₄₀ + ... + T₁₉₃.

1206985 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 1206985 - 2¹¹ = 1204937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

1206985 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1716 + ... + 2314.

It is an arithmetic number, because the mean of its divisors is an integer number (100800).

2^1206985 is an apocalyptic number.

It is an amenable number.

1206985 is a deficient number, since it is larger than the sum of its proper divisors (405815).

1206985 is a wasteful number, since it uses less digits than its factorization.

1206985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1206985 is about 1098.6286906867. The cubic root of 1206985 is about 106.4716434310.

The spelling of 1206985 in words is "one million, two hundred six thousand, nine hundred eighty-five".