3145240521 has 6 divisors (see below), whose sum is σ = 4543125210. Its totient is φ = 2096827008.

The previous prime is 3145240477. The next prime is 3145240541. The reversal of 3145240521 is 1250425413.

It can be written as a sum of positive squares in only one way, i.e., 2667206025 + 478034496 = 51645^2 + 21864^2 .

It is not a de Polignac number, because 3145240521 - 2¹⁰ = 3145239497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3145240541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 174735576 + ... + 174735593.

It is an arithmetic number, because the mean of its divisors is an integer number (757187535).

Almost surely, 2^3145240521 is an apocalyptic number.

It is an amenable number.

3145240521 is a deficient number, since it is larger than the sum of its proper divisors (1397884689).

3145240521 is a wasteful number, since it uses less digits than its factorization.

3145240521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349471175 (or 349471172 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 3145240521 is about 56082.4439642211. The cubic root of 3145240521 is about 1465.1585396884.

Adding to 3145240521 its reverse (1250425413), we get a palindrome (4395665934).

The spelling of 3145240521 in words is "three billion, one hundred forty-five million, two hundred forty thousand, five hundred twenty-one".