642411 has 40 divisors (see below), whose sum is σ = 1208064. Its totient is φ = 330480.

The previous prime is 642407. The next prime is 642419. The reversal of 642411 is 114246.

642411 is a nontrivial binomial coefficient, being equal to C(1134, 2).

It is not a de Polignac number, because 642411 - 2² = 642407 is a prime.

642411 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (642419) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6186 + ... + 6288.

2⁶⁴²⁴¹¹ is an apocalyptic number.

642411 is the 1133-rd triangular number and also the 567-th hexagonal number.

642411 is a deficient number, since it is larger than the sum of its proper divisors (565653).

642411 is a wasteful number, since it uses less digits than its factorization.

642411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 124 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 642411 is about 801.5054584967. The cubic root of 642411 is about 86.2854674548.

Adding to 642411 its reverse (114246), we get a palindrome (756657).

The spelling of 642411 in words is "six hundred forty-two thousand, four hundred eleven".