1259855 has 4 divisors (see below), whose sum is σ = 1511832. Its totient is φ = 1007880.

The previous prime is 1259851. The next prime is 1259873. The reversal of 1259855 is 5589521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5589521 = 7 ⋅798503.

It is not a de Polignac number, because 1259855 - 2² = 1259851 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 (1259851) 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, 125981 + ... + 125990.

It is an arithmetic number, because the mean of its divisors is an integer number (377958).

2^1259855 is an apocalyptic number.

1259855 is a deficient number, since it is larger than the sum of its proper divisors (251977).

1259855 is an equidigital number, since it uses as much as digits as its factorization.

1259855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251976.

The product of its digits is 18000, while the sum is 35.

The square root of 1259855 is about 1122.4326260404. The cubic root of 1259855 is about 108.0040864938.

The spelling of 1259855 in words is "one million, two hundred fifty-nine thousand, eight hundred fifty-five".