645346 has 8 divisors (see below), whose sum is σ = 1042524. Its totient is φ = 297840.

The previous prime is 645329. The next prime is 645347. The reversal of 645346 is 643546.

645346 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 546121 + 99225 = 739^2 + 315^2 .

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

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (645347) by changing a digit.

645346 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12385 + ... + 12436.

2⁶⁴⁵³⁴⁶ is an apocalyptic number.

645346 is a deficient number, since it is larger than the sum of its proper divisors (397178).

645346 is a wasteful number, since it uses less digits than its factorization.

645346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24836.

The product of its digits is 8640, while the sum is 28.

The square root of 645346 is about 803.3343015209. The cubic root of 645346 is about 86.4166727369.

The spelling of 645346 in words is "six hundred forty-five thousand, three hundred forty-six".