1255871 has 4 divisors (see below), whose sum is σ = 1286544. Its totient is φ = 1225200.

The previous prime is 1255861. The next prime is 1255907. The reversal of 1255871 is 1785521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1785521 = 137 ⋅13033.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1255871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15275 + ... + 15356.

It is an arithmetic number, because the mean of its divisors is an integer number (321636).

2^1255871 is an apocalyptic number.

1255871 is a deficient number, since it is larger than the sum of its proper divisors (30673).

1255871 is an equidigital number, since it uses as much as digits as its factorization.

1255871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30672.

The product of its digits is 2800, while the sum is 29.

The square root of 1255871 is about 1120.6565040190. The cubic root of 1255871 is about 107.8901202988.

The spelling of 1255871 in words is "one million, two hundred fifty-five thousand, eight hundred seventy-one".