551642 has 24 divisors (see below), whose sum is σ = 1038996. Its totient is φ = 217728.

The previous prime is 551597. The next prime is 551651. The reversal of 551642 is 246155.

551642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 461041 + 90601 = 679^2 + 301^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

551642 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, 1058 + ... + 1490.

2⁵⁵¹⁶⁴² is an apocalyptic number.

551642 is a deficient number, since it is larger than the sum of its proper divisors (487354).

551642 is a wasteful number, since it uses less digits than its factorization.

551642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 455 counting only the distinct ones).

The product of its digits is 1200, while the sum is 23.

The square root of 551642 is about 742.7260598633. The cubic root of 551642 is about 82.0135809352.

Adding to 551642 its reverse (246155), we get a palindrome (797797).

The spelling of 551642 in words is "five hundred fifty-one thousand, six hundred forty-two".