522649 has 4 divisors (see below), whose sum is σ = 524560. Its totient is φ = 520740.

The previous prime is 522637. The next prime is 522659. The reversal of 522649 is 946225.

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 522649 - 2⁷ = 522521 is a prime.

It is an Ulam number.

It is a Duffinian number.

522649 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (522659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459 + ... + 1120.

It is an arithmetic number, because the mean of its divisors is an integer number (131140).

2⁵²²⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

522649 is a deficient number, since it is larger than the sum of its proper divisors (1911).

522649 is a wasteful number, since it uses less digits than its factorization.

522649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910.

The product of its digits is 4320, while the sum is 28.

The square root of 522649 is about 722.9446728485. The cubic root of 522649 is about 80.5508339858.

It can be divided in two parts, 52 and 2649, that added together give a triangular number (2701 = T₇₃).

The spelling of 522649 in words is "five hundred twenty-two thousand, six hundred forty-nine".