551442 has 16 divisors (see below), whose sum is σ = 1118880. Its totient is φ = 181152.

The previous prime is 551423. The next prime is 551443. The reversal of 551442 is 244155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551443) by changing a digit.

551442 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 (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192 + ... + 1067.

It is an arithmetic number, because the mean of its divisors is an integer number (69930).

2⁵⁵¹⁴⁴² is an apocalyptic number.

551442 is an abundant number, since it is smaller than the sum of its proper divisors (567438).

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

551442 is a wasteful number, since it uses less digits than its factorization.

551442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337.

The product of its digits is 800, while the sum is 21.

The square root of 551442 is about 742.5914085148. The cubic root of 551442 is about 82.0036682872.

Adding to 551442 its reverse (244155), we get a palindrome (795597).

The spelling of 551442 in words is "five hundred fifty-one thousand, four hundred forty-two".