551764 has 6 divisors (see below), whose sum is σ = 965594. Its totient is φ = 275880.

The previous prime is 551753. The next prime is 551767. The reversal of 551764 is 467155.

551764 = T₆₀₅ + T₆₀₆ + T₆₀₇.

It can be written as a sum of positive squares in only one way, i.e., 478864 + 72900 = 692^2 + 270^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68967 + ... + 68974.

2⁵⁵¹⁷⁶⁴ is an apocalyptic number.

551764 is the 607-th centered triangular number.

It is an amenable number.

551764 is a deficient number, since it is larger than the sum of its proper divisors (413830).

551764 is a wasteful number, since it uses less digits than its factorization.

551764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137945 (or 137943 counting only the distinct ones).

The product of its digits is 4200, while the sum is 28.

The square root of 551764 is about 742.8081851999. The cubic root of 551764 is about 82.0196264740.

It can be divided in two parts, 55 and 1764, that multiplied together give a triangular number (97020 = T₄₄₀).

The spelling of 551764 in words is "five hundred fifty-one thousand, seven hundred sixty-four".