1255889 has 4 divisors (see below), whose sum is σ = 1262400. Its totient is φ = 1249380.

The previous prime is 1255861. The next prime is 1255907. The reversal of 1255889 is 9885521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1255889 - 2⁸ = 1255633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1255829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2957 + ... + 3354.

It is an arithmetic number, because the mean of its divisors is an integer number (315600).

2^1255889 is an apocalyptic number.

It is an amenable number.

1255889 is a deficient number, since it is larger than the sum of its proper divisors (6511).

1255889 is an equidigital number, since it uses as much as digits as its factorization.

1255889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6510.

The product of its digits is 28800, while the sum is 38.

The square root of 1255889 is about 1120.6645349970. The cubic root of 1255889 is about 107.8906357480.

The spelling of 1255889 in words is "one million, two hundred fifty-five thousand, eight hundred eighty-nine".