1255770 has 32 divisors (see below), whose sum is σ = 3349440.
Its totient is φ = 334800.
The previous prime is 1255759. The next prime is 1255799. The reversal of 1255770 is 775521.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is a Curzon number.
It is an unprimeable number.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2056 + ... + 2595.
It is an arithmetic number, because the mean of its divisors is an integer number (104670).
21255770 is an apocalyptic number.
1255770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
1255770 is an abundant number, since it is smaller than the sum of its proper divisors (2093670).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1255770 is a wasteful number, since it uses less digits than its factorization.
1255770 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4667 (or 4661 counting only the distinct ones).
The product of its (nonzero) digits is 2450, while the sum is 27.
The square root of 1255770 is about 1120.6114402414.
The cubic root of 1255770 is about 107.8872279651.
Subtracting from 1255770 its reverse (775521), we obtain a square (480249 = 6932).
It can be divided in two parts, 1255 and 770, that added together give a square (2025 = 452).
The spelling of 1255770 in words is "one million, two hundred fifty-five thousand, seven hundred seventy".