1255869 has 12 divisors (see below), whose sum is σ = 1893216. Its totient is φ = 800712.

The previous prime is 1255861. The next prime is 1255907. The reversal of 1255869 is 9685521.

It is a happy number.

It is not a de Polignac number, because 1255869 - 2³ = 1255861 is a prime.

It is a super-2 number, since 2×1255869² = 3154413890322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255861) 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, 2827 + ... + 3240.

It is an arithmetic number, because the mean of its divisors is an integer number (157768).

2^1255869 is an apocalyptic number.

It is an amenable number.

1255869 is a deficient number, since it is larger than the sum of its proper divisors (637347).

1255869 is a wasteful number, since it uses less digits than its factorization.

1255869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6096 (or 6093 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 1255869 is about 1120.6556116845. The cubic root of 1255869 is about 107.8900630264.

The spelling of 1255869 in words is "one million, two hundred fifty-five thousand, eight hundred sixty-nine".