655457 has 6 divisors (see below), whose sum is σ = 720594. Its totient is φ = 595760.

The previous prime is 655453. The next prime is 655471. The reversal of 655457 is 754556.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 421201 + 234256 = 649^2 + 484^2 .

It is not a de Polignac number, because 655457 - 2² = 655453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2588 + ... + 2829.

It is an arithmetic number, because the mean of its divisors is an integer number (120099).

2⁶⁵⁵⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

655457 is a deficient number, since it is larger than the sum of its proper divisors (65137).

655457 is a wasteful number, since it uses less digits than its factorization.

655457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5439 (or 5428 counting only the distinct ones).

The product of its digits is 21000, while the sum is 32.

The square root of 655457 is about 809.6029891249. The cubic root of 655457 is about 86.8656489771.

Subtracting 655457 from its reverse (754556), we obtain a palindrome (99099).

The spelling of 655457 in words is "six hundred fifty-five thousand, four hundred fifty-seven".