1255839 has 12 divisors (see below), whose sum is σ = 1813896. Its totient is φ = 772512.

The previous prime is 1255831. The next prime is 1255847. The reversal of 1255839 is 9385521.

It is an interprime number because it is at equal distance from previous prime (1255831) and next prime (1255847).

It is not a de Polignac number, because 1255839 - 2³ = 1255831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 732 + ... + 1745.

It is an arithmetic number, because the mean of its divisors is an integer number (151158).

2^1255839 is an apocalyptic number.

1255839 is a deficient number, since it is larger than the sum of its proper divisors (558057).

1255839 is a wasteful number, since it uses less digits than its factorization.

1255839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506 (or 2493 counting only the distinct ones).

The product of its digits is 10800, while the sum is 33.

The square root of 1255839 is about 1120.6422265826. The cubic root of 1255839 is about 107.8892039326.

The spelling of 1255839 in words is "one million, two hundred fifty-five thousand, eight hundred thirty-nine".