645411 has 24 divisors (see below), whose sum is σ = 995520. Its totient is φ = 370656.

The previous prime is 645409. The next prime is 645419. The reversal of 645411 is 114546.

645411 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 645411 - 2¹ = 645409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (645419) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9600 + ... + 9666.

It is an arithmetic number, because the mean of its divisors is an integer number (41480).

2⁶⁴⁵⁴¹¹ is an apocalyptic number.

645411 is a deficient number, since it is larger than the sum of its proper divisors (350109).

645411 is a wasteful number, since it uses less digits than its factorization.

645411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 102 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 645411 is about 803.3747568850. The cubic root of 645411 is about 86.4195739688.

Adding to 645411 its reverse (114546), we get a palindrome (759957).

The spelling of 645411 in words is "six hundred forty-five thousand, four hundred eleven".