1255240 has 32 divisors (see below), whose sum is σ = 3228480. Its totient is φ = 430272.

The previous prime is 1255237. The next prime is 1255249. The reversal of 1255240 is 425521.

It is a super-3 number, since 3×1255240³ = 5933371829633472000, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1255249) 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, 1962 + ... + 2521.

It is an arithmetic number, because the mean of its divisors is an integer number (100890).

2^1255240 is an apocalyptic number.

1255240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255240 is an abundant number, since it is smaller than the sum of its proper divisors (1973240).

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

1255240 is a wasteful number, since it uses less digits than its factorization.

1255240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4501 (or 4497 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 1255240 is about 1120.3749372420. The cubic root of 1255240 is about 107.8720478294.

The spelling of 1255240 in words is "one million, two hundred fifty-five thousand, two hundred forty".