551142 has 24 divisors (see below), whose sum is σ = 1214616. Its totient is φ = 180576.

The previous prime is 551129. The next prime is 551143. The reversal of 551142 is 241155.

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

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 551142.

It is not an unprimeable number, because it can be changed into a prime (551143) by changing a digit.

551142 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 978 + ... + 1434.

It is an arithmetic number, because the mean of its divisors is an integer number (50609).

2⁵⁵¹¹⁴² is an apocalyptic number.

551142 is an abundant number, since it is smaller than the sum of its proper divisors (663474).

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

551142 is a wasteful number, since it uses less digits than its factorization.

551142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532 (or 529 counting only the distinct ones).

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

The square root of 551142 is about 742.3893857000. The cubic root of 551142 is about 81.9887948203.

Adding to 551142 its reverse (241155), we get a palindrome (792297).

The spelling of 551142 in words is "five hundred fifty-one thousand, one hundred forty-two".