7578125 has 16 divisors (see below), whose sum is σ = 9570288. Its totient is φ = 6000000.

The previous prime is 7578121. The next prime is 7578143. The reversal of 7578125 is 5218757.

It can be written as a sum of positive squares in 8 ways, for example, as 5692996 + 1885129 = 2386^2 + 1373^2 .

It is not a de Polignac number, because 7578125 - 2² = 7578121 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7578121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78077 + ... + 78173.

It is an arithmetic number, because the mean of its divisors is an integer number (598143).

Almost surely, 2^7578125 is an apocalyptic number.

It is an amenable number.

7578125 is a deficient number, since it is larger than the sum of its proper divisors (1992163).

7578125 is an frugal number, since it uses more digits than its factorization.

7578125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 102 counting only the distinct ones).

The product of its digits is 19600, while the sum is 35.

The square root of 7578125 is about 2752.8394431932. The cubic root of 7578125 is about 196.4207001962.

The spelling of 7578125 in words is "seven million, five hundred seventy-eight thousand, one hundred twenty-five".