645058 has 16 divisors (see below), whose sum is σ = 1039680. Its totient is φ = 299376.

The previous prime is 645049. The next prime is 645067. The reversal of 645058 is 850546.

It is an interprime number because it is at equal distance from previous prime (645049) and next prime (645067).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1513 + ... + 1891.

It is an arithmetic number, because the mean of its divisors is an integer number (64980).

2⁶⁴⁵⁰⁵⁸ is an apocalyptic number.

645058 is a deficient number, since it is larger than the sum of its proper divisors (394622).

645058 is a wasteful number, since it uses less digits than its factorization.

645058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 645058 is about 803.1550286215. The cubic root of 645058 is about 86.4038157037.

The spelling of 645058 in words is "six hundred forty-five thousand, fifty-eight".