1255611 has 8 divisors (see below), whose sum is σ = 1913344. Its totient is φ = 717480.

The previous prime is 1255609. The next prime is 1255619. The reversal of 1255611 is 1165521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1255611 - 2¹ = 1255609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 59791 = 1255611 / (1 + 2 + 5 + 5 + 6 + 1 + 1).

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255619) 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 7 ways as a sum of consecutive naturals, for example, 29875 + ... + 29916.

It is an arithmetic number, because the mean of its divisors is an integer number (239168).

2^1255611 is an apocalyptic number.

1255611 is a deficient number, since it is larger than the sum of its proper divisors (657733).

1255611 is an equidigital number, since it uses as much as digits as its factorization.

1255611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59801.

The product of its digits is 300, while the sum is 21.

The square root of 1255611 is about 1120.5404945829. The cubic root of 1255611 is about 107.8826743729.

The spelling of 1255611 in words is "one million, two hundred fifty-five thousand, six hundred eleven".