1255680 has 108 divisors (see below), whose sum is σ = 4384380. Its totient is φ = 331776.

The previous prime is 1255679. The next prime is 1255687. The reversal of 1255680 is 865521.

It can be written as a sum of positive squares in 2 ways, for example, as 665856 + 589824 = 816^2 + 768^2 .

It is not an unprimeable number, because it can be changed into a prime (1255687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11466 + ... + 11574.

2^1255680 is an apocalyptic number.

1255680 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 1255680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2192190).

1255680 is an abundant number, since it is smaller than the sum of its proper divisors (3128700).

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

1255680 is a wasteful number, since it uses less digits than its factorization.

1255680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1255680 is about 1120.5712828732. The cubic root of 1255680 is about 107.8846505073.

The spelling of 1255680 in words is "one million, two hundred fifty-five thousand, six hundred eighty".