706521 has 16 divisors (see below), whose sum is σ = 995328. Its totient is φ = 445200.

The previous prime is 706507. The next prime is 706523. The reversal of 706521 is 125607.

It is not a de Polignac number, because 706521 - 2⁹ = 706009 is a prime.

It is a Curzon number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (706523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6550 + ... + 6656.

It is an arithmetic number, because the mean of its divisors is an integer number (62208).

2⁷⁰⁶⁵²¹ is an apocalyptic number.

706521 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

706521 is a deficient number, since it is larger than the sum of its proper divisors (288807).

706521 is a wasteful number, since it uses less digits than its factorization.

706521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 706521 is about 840.5480355102. The cubic root of 706521 is about 89.0652637493.

The spelling of 706521 in words is "seven hundred six thousand, five hundred twenty-one".