1205680 has 40 divisors (see below), whose sum is σ = 3205152. Its totient is φ = 413184.

The previous prime is 1205669. The next prime is 1205681. The reversal of 1205680 is 865021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1205681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517 + ... + 1636.

2^1205680 is an apocalyptic number.

1205680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205680 is an abundant number, since it is smaller than the sum of its proper divisors (1999472).

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

1205680 is a wasteful number, since it uses less digits than its factorization.

1205680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2173 (or 2167 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1205680 is about 1098.0346078335. The cubic root of 1205680 is about 106.4332569829.

The spelling of 1205680 in words is "one million, two hundred five thousand, six hundred eighty".