3147145 has 4 divisors (see below), whose sum is σ = 3776580. Its totient is φ = 2517712.

The previous prime is 3147143. The next prime is 3147149. The reversal of 3147145 is 5417413.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2271049 + 876096 = 1507^2 + 936^2 .

It is a cyclic number.

It is not a de Polignac number, because 3147145 - 2¹ = 3147143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3147143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314710 + ... + 314719.

It is an arithmetic number, because the mean of its divisors is an integer number (944145).

Almost surely, 2^3147145 is an apocalyptic number.

It is an amenable number.

3147145 is a deficient number, since it is larger than the sum of its proper divisors (629435).

3147145 is an equidigital number, since it uses as much as digits as its factorization.

3147145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629434.

The product of its digits is 1680, while the sum is 25.

The square root of 3147145 is about 1774.0194474695. The cubic root of 3147145 is about 146.5454203421.

The spelling of 3147145 in words is "three million, one hundred forty-seven thousand, one hundred forty-five".