7812125 has 8 divisors (see below), whose sum is σ = 9749688. Its totient is φ = 6249600.

The previous prime is 7812121. The next prime is 7812127. The reversal of 7812125 is 5212187.

It can be written as a sum of positive squares in 4 ways, for example, as 597529 + 7214596 = 773^2 + 2686^2 .

It is not a de Polignac number, because 7812125 - 2² = 7812121 is a prime.

It is a super-2 number, since 2×7812125² = 122058594031250, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7812094 and 7812103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7812121) 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, 31124 + ... + 31373.

It is an arithmetic number, because the mean of its divisors is an integer number (1218711).

Almost surely, 2^7812125 is an apocalyptic number.

It is an amenable number.

7812125 is a deficient number, since it is larger than the sum of its proper divisors (1937563).

7812125 is an equidigital number, since it uses as much as digits as its factorization.

7812125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62512 (or 62502 counting only the distinct ones).

The product of its digits is 1120, while the sum is 26.

The square root of 7812125 is about 2795.0178890304. The cubic root of 7812125 is about 198.4219566431.

The spelling of 7812125 in words is "seven million, eight hundred twelve thousand, one hundred twenty-five".