3125312145 has 12 divisors (see below), whose sum is σ = 5417207796. Its totient is φ = 1666833120.

The previous prime is 3125312137. The next prime is 3125312167. The reversal of 3125312145 is 5412135213.

It can be written as a sum of positive squares in 2 ways, for example, as 1727150481 + 1398161664 = 41559^2 + 37392^2 .

It is not a de Polignac number, because 3125312145 - 2³ = 3125312137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34725646 + ... + 34725735.

It is an arithmetic number, because the mean of its divisors is an integer number (451433983).

Almost surely, 2^3125312145 is an apocalyptic number.

It is an amenable number.

3125312145 is a deficient number, since it is larger than the sum of its proper divisors (2291895651).

3125312145 is a wasteful number, since it uses less digits than its factorization.

3125312145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69451392 (or 69451389 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 3125312145 is about 55904.4912775351. The cubic root of 3125312145 is about 1462.0575457533.

Adding to 3125312145 its reverse (5412135213), we get a palindrome (8537447358).

The spelling of 3125312145 in words is "three billion, one hundred twenty-five million, three hundred twelve thousand, one hundred forty-five".