7125609 has 4 divisors (see below), whose sum is σ = 9500816. Its totient is φ = 4750404.

The previous prime is 7125583. The next prime is 7125611. The reversal of 7125609 is 9065217.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 7125609 - 2⁸ = 7125353 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7125649) 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 3 ways as a sum of consecutive naturals, for example, 1187599 + ... + 1187604.

It is an arithmetic number, because the mean of its divisors is an integer number (2375204).

Almost surely, 2^7125609 is an apocalyptic number.

It is an amenable number.

7125609 is a deficient number, since it is larger than the sum of its proper divisors (2375207).

7125609 is a wasteful number, since it uses less digits than its factorization.

7125609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375206.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 7125609 is about 2669.3836367222. The cubic root of 7125609 is about 192.4305388338.

The spelling of 7125609 in words is "seven million, one hundred twenty-five thousand, six hundred nine".