511542 has 16 divisors (see below), whose sum is σ = 1136880. Its totient is φ = 170496.

The previous prime is 511541. The next prime is 511549. The reversal of 511542 is 245115.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4683 + ... + 4790.

It is an arithmetic number, because the mean of its divisors is an integer number (71055).

2⁵¹¹⁵⁴² is an apocalyptic number.

511542 is an abundant number, since it is smaller than the sum of its proper divisors (625338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

511542 is a wasteful number, since it uses less digits than its factorization.

511542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9484 (or 9478 counting only the distinct ones).

The product of its digits is 200, while the sum is 18.

The square root of 511542 is about 715.2216439678. The cubic root of 511542 is about 79.9761387170.

Adding to 511542 its reverse (245115), we get a palindrome (756657).

The spelling of 511542 in words is "five hundred eleven thousand, five hundred forty-two".