646057 has 8 divisors (see below), whose sum is σ = 699200. Its totient is φ = 594864.

The previous prime is 646039. The next prime is 646067. The reversal of 646057 is 750646.

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

It is a cyclic number.

It is not a de Polignac number, because 646057 - 2¹¹ = 644009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646027) 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, 244 + ... + 1162.

It is an arithmetic number, because the mean of its divisors is an integer number (87400).

2⁶⁴⁶⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

646057 is a deficient number, since it is larger than the sum of its proper divisors (53143).

646057 is a wasteful number, since it uses less digits than its factorization.

646057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 646057 is about 803.7767102871. The cubic root of 646057 is about 86.4483971678.

The spelling of 646057 in words is "six hundred forty-six thousand, fifty-seven".