551406 has 16 divisors (see below), whose sum is σ = 1141200. Its totient is φ = 177408.

The previous prime is 551387. The next prime is 551407. The reversal of 551406 is 604155.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551407) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1411 + ... + 1758.

It is an arithmetic number, because the mean of its divisors is an integer number (71325).

2⁵⁵¹⁴⁰⁶ is an apocalyptic number.

551406 is an abundant number, since it is smaller than the sum of its proper divisors (589794).

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

551406 is a wasteful number, since it uses less digits than its factorization.

551406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3203.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 551406 is about 742.5671686790. The cubic root of 551406 is about 82.0018837561.

The spelling of 551406 in words is "five hundred fifty-one thousand, four hundred six".