521260 has 24 divisors (see below), whose sum is σ = 1113840. Its totient is φ = 204864.

The previous prime is 521251. The next prime is 521267. The reversal of 521260 is 62125.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (521267) by changing a digit.

521260 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 1146 + ... + 1534.

It is an arithmetic number, because the mean of its divisors is an integer number (46410).

2⁵²¹²⁶⁰ is an apocalyptic number.

It is an amenable number.

521260 is an abundant number, since it is smaller than the sum of its proper divisors (592580).

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

521260 is a wasteful number, since it uses less digits than its factorization.

521260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 463 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 521260 is about 721.9833793101. The cubic root of 521260 is about 80.4794129679.

Adding to 521260 its reverse (62125), we get a palindrome (583385).

It can be divided in two parts, 521 and 260, that multiplied together give a triangular number (135460 = T₅₂₀).

The spelling of 521260 in words is "five hundred twenty-one thousand, two hundred sixty".