1255285 has 4 divisors (see below), whose sum is σ = 1506348. Its totient is φ = 1004224.

The previous prime is 1255279. The next prime is 1255301. The reversal of 1255285 is 5825521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 848241 + 407044 = 921^2 + 638^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255285 - 2⁵ = 1255253 is a prime.

It is a Duffinian number.

1255285 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125524 + ... + 125533.

It is an arithmetic number, because the mean of its divisors is an integer number (376587).

2^1255285 is an apocalyptic number.

It is an amenable number.

1255285 is a deficient number, since it is larger than the sum of its proper divisors (251063).

1255285 is an equidigital number, since it uses as much as digits as its factorization.

1255285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251062.

The product of its digits is 4000, while the sum is 28.

The square root of 1255285 is about 1120.3950196248. The cubic root of 1255285 is about 107.8733368748.

It can be divided in two parts, 1255 and 285, that added together give a triangular number (1540 = T₅₅).

The spelling of 1255285 in words is "one million, two hundred fifty-five thousand, two hundred eighty-five".