1255220 has 12 divisors (see below), whose sum is σ = 2636004. Its totient is φ = 502080.

The previous prime is 1255211. The next prime is 1255237. The reversal of 1255220 is 225521.

It can be written as a sum of positive squares in 2 ways, for example, as 283024 + 972196 = 532^2 + 986^2 .

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, 31361 + ... + 31400.

It is an arithmetic number, because the mean of its divisors is an integer number (219667).

2^1255220 is an apocalyptic number.

1255220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255220 is an abundant number, since it is smaller than the sum of its proper divisors (1380784).

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

1255220 is a wasteful number, since it uses less digits than its factorization.

1255220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62770 (or 62768 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 1255220 is about 1120.3660116230. The cubic root of 1255220 is about 107.8714749104.

The spelling of 1255220 in words is "one million, two hundred fifty-five thousand, two hundred twenty".