551749 has 4 divisors (see below), whose sum is σ = 601920. Its totient is φ = 501580.

The previous prime is 551743. The next prime is 551753. The reversal of 551749 is 947155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 551749 - 2⁵ = 551717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 551749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25069 + ... + 25090.

It is an arithmetic number, because the mean of its divisors is an integer number (150480).

2⁵⁵¹⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

551749 is a deficient number, since it is larger than the sum of its proper divisors (50171).

551749 is a wasteful number, since it uses less digits than its factorization.

551749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50170.

The product of its digits is 6300, while the sum is 31.

The square root of 551749 is about 742.7980883120. The cubic root of 551749 is about 82.0188832181.

The spelling of 551749 in words is "five hundred fifty-one thousand, seven hundred forty-nine".