1205340 has 24 divisors (see below), whose sum is σ = 3375120. Its totient is φ = 321408.

The previous prime is 1205339. The next prime is 1205377. The reversal of 1205340 is 435021.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9985 + ... + 10104.

It is an arithmetic number, because the mean of its divisors is an integer number (140630).

2^1205340 is an apocalyptic number.

1205340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205340 is an abundant number, since it is smaller than the sum of its proper divisors (2169780).

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

1205340 is a wasteful number, since it uses less digits than its factorization.

1205340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20101 (or 20099 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 1205340 is about 1097.8797748388. The cubic root of 1205340 is about 106.4232513680.

It can be divided in two parts, 120 and 5340, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 1205340 in words is "one million, two hundred five thousand, three hundred forty".