1255040 has 64 divisors (see below), whose sum is σ = 3139560. Its totient is φ = 479232.

The previous prime is 1255039. The next prime is 1255049. The reversal of 1255040 is 405521.

It can be written as a sum of positive squares in 4 ways, for example, as 1236544 + 18496 = 1112^2 + 136^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23654 + ... + 23706.

2^1255040 is an apocalyptic number.

1255040 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 1255040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1569780).

1255040 is an abundant number, since it is smaller than the sum of its proper divisors (1884520).

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

1255040 is an equidigital number, since it uses as much as digits as its factorization.

1255040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 97 counting only the distinct ones).

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

The square root of 1255040 is about 1120.2856778519. The cubic root of 1255040 is about 107.8663183658.

The spelling of 1255040 in words is "one million, two hundred fifty-five thousand, forty".