1255900 has 36 divisors (see below), whose sum is σ = 2873080. Its totient is φ = 475200.

The previous prime is 1255861. The next prime is 1255907. The reversal of 1255900 is 95521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1570 + ... + 2230.

2^1255900 is an apocalyptic number.

1255900 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 1255900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1436540).

1255900 is an abundant number, since it is smaller than the sum of its proper divisors (1617180).

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

1255900 is a wasteful number, since it uses less digits than its factorization.

1255900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 1255900 is about 1120.6694427886. The cubic root of 1255900 is about 107.8909507423.

The spelling of 1255900 in words is "one million, two hundred fifty-five thousand, nine hundred".