1255521 has 8 divisors (see below), whose sum is σ = 1719424. Its totient is φ = 814320.

The previous prime is 1255519. The next prime is 1255549.

1255521 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 1255521 - 2¹ = 1255519 is a prime.

It is the 1121-st Hogben number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1255591) by changing a digit.

It is a nontrivial repunit in base 1120.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5545 + ... + 5766.

It is an arithmetic number, because the mean of its divisors is an integer number (214928).

2^1255521 is an apocalyptic number.

It is an amenable number.

1255521 is a deficient number, since it is larger than the sum of its proper divisors (463903).

1255521 is a wasteful number, since it uses less digits than its factorization.

1255521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11351.

The product of its digits is 500, while the sum is 21.

The square root of 1255521 is about 1120.5003346720. The cubic root of 1255521 is about 107.8800966975.

The spelling of 1255521 in words is "one million, two hundred fifty-five thousand, five hundred twenty-one".