3120625 has 10 divisors (see below), whose sum is σ = 3900314. Its totient is φ = 2496000.

The previous prime is 3120619. The next prime is 3120629. The reversal of 3120625 is 5260213.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 1461681 + 1658944 = 1209^2 + 1288^2 .

It is not a de Polignac number, because 3120625 - 2⁷ = 3120497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3120629) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1872 + ... + 3121.

Almost surely, 2^3120625 is an apocalyptic number.

It is an amenable number.

3120625 is a deficient number, since it is larger than the sum of its proper divisors (779689).

3120625 is an frugal number, since it uses more digits than its factorization.

3120625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5013 (or 4998 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 3120625 is about 1766.5290826930. The cubic root of 3120625 is about 146.1326279660.

Adding to 3120625 its reverse (5260213), we get a palindrome (8380838).

The spelling of 3120625 in words is "three million, one hundred twenty thousand, six hundred twenty-five".