655257 has 4 divisors (see below), whose sum is σ = 873680. Its totient is φ = 436836.

The previous prime is 655243. The next prime is 655261. The reversal of 655257 is 752556.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 655257 - 2⁴ = 655241 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655267) 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, 109207 + ... + 109212.

It is an arithmetic number, because the mean of its divisors is an integer number (218420).

2⁶⁵⁵²⁵⁷ is an apocalyptic number.

It is an amenable number.

655257 is a deficient number, since it is larger than the sum of its proper divisors (218423).

655257 is a wasteful number, since it uses less digits than its factorization.

655257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218422.

The product of its digits is 10500, while the sum is 30.

The square root of 655257 is about 809.4794623707. The cubic root of 655257 is about 86.8568129553.

The spelling of 655257 in words is "six hundred fifty-five thousand, two hundred fifty-seven".