3120705725 has 12 divisors (see below), whose sum is σ = 4097303604. Its totient is φ = 2349707520.

The previous prime is 3120705713. The next prime is 3120705727. The reversal of 3120705725 is 5275070213.

It can be written as a sum of positive squares in 6 ways, for example, as 9966649 + 3110739076 = 3157^2 + 55774^2 .

It is not a de Polignac number, because 3120705725 - 2⁶ = 3120705661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3120705691 and 3120705700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3120705727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3670994 + ... + 3671843.

It is an arithmetic number, because the mean of its divisors is an integer number (341441967).

Almost surely, 2^3120705725 is an apocalyptic number.

It is an amenable number.

3120705725 is a deficient number, since it is larger than the sum of its proper divisors (976597879).

3120705725 is a wasteful number, since it uses less digits than its factorization.

3120705725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7342864 (or 7342859 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 3120705725 is about 55863.2770700037. The cubic root of 3120705725 is about 1461.3388801857.

Adding to 3120705725 its reverse (5275070213), we get a palindrome (8395775938).

The spelling of 3120705725 in words is "three billion, one hundred twenty million, seven hundred five thousand, seven hundred twenty-five".