511406 has 8 divisors (see below), whose sum is σ = 876720. Its totient is φ = 219168.

The previous prime is 511391. The next prime is 511409. The reversal of 511406 is 604115.

It is a happy number.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 511406.

It is not an unprimeable number, because it can be changed into a prime (511409) by changing a digit.

511406 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18251 + ... + 18278.

It is an arithmetic number, because the mean of its divisors is an integer number (109590).

2⁵¹¹⁴⁰⁶ is an apocalyptic number.

511406 is a deficient number, since it is larger than the sum of its proper divisors (365314).

511406 is a wasteful number, since it uses less digits than its factorization.

511406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36538.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 511406 is about 715.1265622252. The cubic root of 511406 is about 79.9690505282.

It can be divided in two parts, 5 and 11406, that added together give a palindrome (11411).

The spelling of 511406 in words is "five hundred eleven thousand, four hundred six".