1206440 has 16 divisors (see below), whose sum is σ = 2714580. Its totient is φ = 482560.

The previous prime is 1206433. The next prime is 1206449. The reversal of 1206440 is 446021.

1206440 = T₃₀₅ + T₃₀₆ + ... + T₃₂₈.

It can be written as a sum of positive squares in 2 ways, for example, as 1196836 + 9604 = 1094^2 + 98^2 .

It is not an unprimeable number, because it can be changed into a prime (1206449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15041 + ... + 15120.

2^1206440 is an apocalyptic number.

1206440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1206440 is an abundant number, since it is smaller than the sum of its proper divisors (1508140).

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

1206440 is a wasteful number, since it uses less digits than its factorization.

1206440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30172 (or 30168 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1206440 is about 1098.3806261948. The cubic root of 1206440 is about 106.4556156754.

The spelling of 1206440 in words is "one million, two hundred six thousand, four hundred forty".