511142 has 4 divisors (see below), whose sum is σ = 766716. Its totient is φ = 255570.

The previous prime is 511123. The next prime is 511151. The reversal of 511142 is 241115.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×511142² = 522532288328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

511142 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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127784 + ... + 127787.

It is an arithmetic number, because the mean of its divisors is an integer number (191679).

2⁵¹¹¹⁴² is an apocalyptic number.

511142 is a deficient number, since it is larger than the sum of its proper divisors (255574).

511142 is a wasteful number, since it uses less digits than its factorization.

511142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255573.

The product of its digits is 40, while the sum is 14.

The square root of 511142 is about 714.9419556859. The cubic root of 511142 is about 79.9552875146.

Adding to 511142 its reverse (241115), we get a palindrome (752257).

The spelling of 511142 in words is "five hundred eleven thousand, one hundred forty-two".