648557 has 8 divisors (see below), whose sum is σ = 798336. Its totient is φ = 513072.

The previous prime is 648509. The next prime is 648563. The reversal of 648557 is 755846.

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

It is not a de Polignac number, because 648557 - 2¹⁶ = 583021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3473 + ... + 3654.

It is an arithmetic number, because the mean of its divisors is an integer number (99792).

2⁶⁴⁸⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

648557 is a deficient number, since it is larger than the sum of its proper divisors (149779).

648557 is a wasteful number, since it uses less digits than its factorization.

648557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7147.

The product of its digits is 33600, while the sum is 35.

The square root of 648557 is about 805.3303669923. The cubic root of 648557 is about 86.5597613465.

The spelling of 648557 in words is "six hundred forty-eight thousand, five hundred fifty-seven".