1255518 has 48 divisors (see below), whose sum is σ = 3150576. Its totient is φ = 357120.

The previous prime is 1255477. The next prime is 1255519. The reversal of 1255518 is 8155521.

It is a junction number, because it is equal to n+sod(n) for n = 1255491 and 1255500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255519) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3180 + ... + 3552.

It is an arithmetic number, because the mean of its divisors is an integer number (65637).

2^1255518 is an apocalyptic number.

1255518 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1255518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1575288).

1255518 is an abundant number, since it is smaller than the sum of its proper divisors (1895058).

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

1255518 is a wasteful number, since it uses less digits than its factorization.

1255518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 406 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The square root of 1255518 is about 1120.4989959835. The cubic root of 1255518 is about 107.8800107729.

The spelling of 1255518 in words is "one million, two hundred fifty-five thousand, five hundred eighteen".