1255540 has 48 divisors (see below), whose sum is σ = 3104640. Its totient is φ = 420480.

The previous prime is 1255519. The next prime is 1255549. The reversal of 1255540 is 455521.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2641 + ... + 3079.

It is an arithmetic number, because the mean of its divisors is an integer number (64680).

2^1255540 is an apocalyptic number.

1255540 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 1255540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1552320).

1255540 is an abundant number, since it is smaller than the sum of its proper divisors (1849100).

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

1255540 is a wasteful number, since it uses less digits than its factorization.

1255540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 1255540 is about 1120.5088129952. The cubic root of 1255540 is about 107.8806408837.

It can be divided in two parts, 125 and 5540, that added together give a palindrome (5665).

The spelling of 1255540 in words is "one million, two hundred fifty-five thousand, five hundred forty".