1255617 has 18 divisors (see below), whose sum is σ = 1995266. Its totient is φ = 760320.

The previous prime is 1255609. The next prime is 1255619. The reversal of 1255617 is 7165521.

It can be written as a sum of positive squares in only one way, i.e., 1185921 + 69696 = 1089^2 + 264^2 .

It is not a de Polignac number, because 1255617 - 2³ = 1255609 is a prime.

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 polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 513 + ... + 1665.

2^1255617 is an apocalyptic number.

It is an amenable number.

1255617 is a deficient number, since it is larger than the sum of its proper divisors (739649).

1255617 is a wasteful number, since it uses less digits than its factorization.

1255617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181 (or 1167 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 1255617 is about 1120.5431718591. The cubic root of 1255617 is about 107.8828462136.

The spelling of 1255617 in words is "one million, two hundred fifty-five thousand, six hundred seventeen".