70724 has 6 divisors (see below), whose sum is σ = 123774. Its totient is φ = 35360.

The previous prime is 70717. The next prime is 70729. The reversal of 70724 is 42707.

It can be written as a sum of positive squares in only one way, i.e., 53824 + 16900 = 232^2 + 130^2 .

It is a plaindrome in base 16.

It is a zygodrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 70696 and 70705.

It is not an unprimeable number, because it can be changed into a prime (70729) by changing a digit.

70724 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 (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8837 + ... + 8844.

It is an arithmetic number, because the mean of its divisors is an integer number (20629).

2⁷⁰⁷²⁴ is an apocalyptic number.

It is an amenable number.

70724 is a deficient number, since it is larger than the sum of its proper divisors (53050).

70724 is a wasteful number, since it uses less digits than its factorization.

70724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17685 (or 17683 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 70724 is about 265.9398428216. The cubic root of 70724 is about 41.3544521514.

The spelling of 70724 in words is "seventy thousand, seven hundred twenty-four", and thus it is an iban number.