1255771 has 4 divisors (see below), whose sum is σ = 1369944.
Its totient is φ = 1141600.
The previous prime is 1255759. The next prime is 1255799. The reversal of 1255771 is 1775521.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1775521 = 11 ⋅161411.
It is a cyclic number.
It is not a de Polignac number, because 1255771 - 29 = 1255259 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (1255721) 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 3 ways as a sum of consecutive naturals, for example, 57070 + ... + 57091.
It is an arithmetic number, because the mean of its divisors is an integer number (342486).
21255771 is an apocalyptic number.
1255771 is a gapful number since it is divisible by the number (11) formed by its first and last digit.
1255771 is a deficient number, since it is larger than the sum of its proper divisors (114173).
1255771 is a wasteful number, since it uses less digits than its factorization.
1255771 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 114172.
The product of its digits is 2450, while the sum is 28.
The square root of 1255771 is about 1120.6118864263.
The cubic root of 1255771 is about 107.8872566028.
The spelling of 1255771 in words is "one million, two hundred fifty-five thousand, seven hundred seventy-one".