7213705 has 8 divisors (see below), whose sum is σ = 8890632. Its totient is φ = 5614848.

The previous prime is 7213699. The next prime is 7213709. The reversal of 7213705 is 5073127.

It can be written as a sum of positive squares in 4 ways, for example, as 1245456 + 5968249 = 1116^2 + 2443^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7213705 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7213705.

It is not an unprimeable number, because it can be changed into a prime (7213709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19312 + ... + 19681.

It is an arithmetic number, because the mean of its divisors is an integer number (1111329).

Almost surely, 2^7213705 is an apocalyptic number.

It is an amenable number.

7213705 is a deficient number, since it is larger than the sum of its proper divisors (1676927).

7213705 is a wasteful number, since it uses less digits than its factorization.

7213705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39035.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 7213705 is about 2685.8341348639. The cubic root of 7213705 is about 193.2203180811.

The spelling of 7213705 in words is "seven million, two hundred thirteen thousand, seven hundred five".