1206840 has 64 divisors (see below), whose sum is σ = 3693600. Its totient is φ = 315392.

The previous prime is 1206827. The next prime is 1206841. The reversal of 1206840 is 486021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206841) 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, 10624 + ... + 10736.

2^1206840 is an apocalyptic number.

1206840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1206840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1846800).

1206840 is an abundant number, since it is smaller than the sum of its proper divisors (2486760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1206840 is a wasteful number, since it uses less digits than its factorization.

1206840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1206840 is about 1098.5626973459. The cubic root of 1206840 is about 106.4673796369.

Multiplying 1206840 by its sum of digits (21), we get a triangular number (25343640 = T₇₁₁₉).

The spelling of 1206840 in words is "one million, two hundred six thousand, eight hundred forty".