1255511 has 4 divisors (see below), whose sum is σ = 1282272. Its totient is φ = 1228752.

The previous prime is 1255477. The next prime is 1255519. The reversal of 1255511 is 1155521.

It is a happy number.

1255511 is an esthetic number in base 9, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1155521 = 331 ⋅3491.

It is a cyclic number.

It is not a de Polignac number, because 1255511 - 2¹⁴ = 1239127 is a prime.

It is a super-2 number, since 2×1255511² = 3152615742242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255519) 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, 13310 + ... + 13403.

It is an arithmetic number, because the mean of its divisors is an integer number (320568).

2^1255511 is an apocalyptic number.

1255511 is a deficient number, since it is larger than the sum of its proper divisors (26761).

1255511 is an equidigital number, since it uses as much as digits as its factorization.

1255511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26760.

The product of its digits is 250, while the sum is 20.

The square root of 1255511 is about 1120.4958723708. The cubic root of 1255511 is about 107.8798102816.

The spelling of 1255511 in words is "one million, two hundred fifty-five thousand, five hundred eleven".