7120609 has 4 divisors (see below), whose sum is σ = 7128340. Its totient is φ = 7112880.

The previous prime is 7120583. The next prime is 7120621. The reversal of 7120609 is 9060217.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9060217 = 59 ⋅153563.

It can be written as a sum of positive squares in 2 ways, for example, as 5290000 + 1830609 = 2300^2 + 1353^2 .

It is a cyclic number.

It is not a de Polignac number, because 7120609 - 2⁷ = 7120481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7120679) 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, 2262 + ... + 4399.

It is an arithmetic number, because the mean of its divisors is an integer number (1782085).

Almost surely, 2^7120609 is an apocalyptic number.

It is an amenable number.

7120609 is a deficient number, since it is larger than the sum of its proper divisors (7731).

7120609 is a wasteful number, since it uses less digits than its factorization.

7120609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7730.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 7120609 is about 2668.4469265848. The cubic root of 7120609 is about 192.3855191577.

The spelling of 7120609 in words is "seven million, one hundred twenty thousand, six hundred nine".