7140289 has 8 divisors (see below), whose sum is σ = 8142120. Its totient is φ = 6203136.

The previous prime is 7140283. The next prime is 7140299. The reversal of 7140289 is 9820417.

It can be written as a sum of positive squares in 4 ways, for example, as 2265025 + 4875264 = 1505^2 + 2208^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7140289 - 2⁹ = 7139777 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 7140289.

It is not an unprimeable number, because it can be changed into a prime (7140283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15934 + ... + 16375.

It is an arithmetic number, because the mean of its divisors is an integer number (1017765).

Almost surely, 2^7140289 is an apocalyptic number.

It is an amenable number.

7140289 is a deficient number, since it is larger than the sum of its proper divisors (1001831).

7140289 is a wasteful number, since it uses less digits than its factorization.

7140289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32339.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 7140289 is about 2672.1319203961. The cubic root of 7140289 is about 192.5625950371.

The spelling of 7140289 in words is "seven million, one hundred forty thousand, two hundred eighty-nine".