712685 has 4 divisors (see below), whose sum is σ = 855228. Its totient is φ = 570144.

The previous prime is 712681. The next prime is 712687. The reversal of 712685 is 586217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 586217 = 257 ⋅2281.

It can be written as a sum of positive squares in 2 ways, for example, as 306916 + 405769 = 554^2 + 637^2 .

It is a cyclic number.

It is not a de Polignac number, because 712685 - 2² = 712681 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (712681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71264 + ... + 71273.

It is an arithmetic number, because the mean of its divisors is an integer number (213807).

2⁷¹²⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

712685 is a deficient number, since it is larger than the sum of its proper divisors (142543).

712685 is a wasteful number, since it uses less digits than its factorization.

712685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142542.

The product of its digits is 3360, while the sum is 29.

The square root of 712685 is about 844.2067282366. The cubic root of 712685 is about 89.3235289728.

The spelling of 712685 in words is "seven hundred twelve thousand, six hundred eighty-five".