521469 has 12 divisors (see below), whose sum is σ = 811356. Its totient is φ = 320832.

The previous prime is 521447. The next prime is 521471. The reversal of 521469 is 964125.

It can be written as a sum of positive squares in 2 ways, for example, as 213444 + 308025 = 462^2 + 555^2 .

It is not a de Polignac number, because 521469 - 2⁹ = 520957 is a prime.

It is a super-2 number, since 2×521469² = 543859835922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 521469.

It is not an unprimeable number, because it can be changed into a prime (521429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2112 + ... + 2345.

It is an arithmetic number, because the mean of its divisors is an integer number (67613).

2⁵²¹⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

521469 is a deficient number, since it is larger than the sum of its proper divisors (289887).

521469 is a wasteful number, since it uses less digits than its factorization.

521469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4476 (or 4473 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 521469 is about 722.1281049786. The cubic root of 521469 is about 80.4901676455.

It can be divided in two parts, 521 and 469, that added together give a triangular number (990 = T₄₄).

The spelling of 521469 in words is "five hundred twenty-one thousand, four hundred sixty-nine".