521707 has 2 divisors, whose sum is σ = 521708. Its totient is φ = 521706.

The previous prime is 521693. The next prime is 521723. The reversal of 521707 is 707125.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521707 is a prime.

It is a zygodrome in base 3.

It is not a weakly prime, because it can be changed into another prime (521767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260853 + 260854.

It is an arithmetic number, because the mean of its divisors is an integer number (260854).

2⁵²¹⁷⁰⁷ is an apocalyptic number.

521707 is a deficient number, since it is larger than the sum of its proper divisors (1).

521707 is an equidigital number, since it uses as much as digits as its factorization.

521707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 490, while the sum is 22.

The square root of 521707 is about 722.2928768858. The cubic root of 521707 is about 80.5024111002.

It can be divided in two parts, 5 and 21707, that added together give a palindrome (21712).

The spelling of 521707 in words is "five hundred twenty-one thousand, seven hundred seven".