7140685 has 4 divisors (see below), whose sum is σ = 8568828. Its totient is φ = 5712544.

The previous prime is 7140677. The next prime is 7140689. The reversal of 7140685 is 5860417.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3613801 + 3526884 = 1901^2 + 1878^2 .

It is a cyclic number.

It is not a de Polignac number, because 7140685 - 2³ = 7140677 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7140689) 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, 714064 + ... + 714073.

It is an arithmetic number, because the mean of its divisors is an integer number (2142207).

Almost surely, 2^7140685 is an apocalyptic number.

It is an amenable number.

7140685 is a deficient number, since it is larger than the sum of its proper divisors (1428143).

7140685 is a wasteful number, since it uses less digits than its factorization.

7140685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428142.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 7140685 is about 2672.2060175069. The cubic root of 7140685 is about 192.5661548079.

The spelling of 7140685 in words is "seven million, one hundred forty thousand, six hundred eighty-five".