3145909 has 4 divisors (see below), whose sum is σ = 3387916. Its totient is φ = 2903904.

The previous prime is 3145903. The next prime is 3145913. The reversal of 3145909 is 9095413.

3145909 = T₃₈₂ + T₃₈₃ + ... + T₄₂₀.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9095413 = 1307 ⋅6959.

It can be written as a sum of positive squares in 2 ways, for example, as 180625 + 2965284 = 425^2 + 1722^2 .

It is a cyclic number.

It is not a de Polignac number, because 3145909 - 2⁷ = 3145781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3145903) 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, 120984 + ... + 121009.

It is an arithmetic number, because the mean of its divisors is an integer number (846979).

Almost surely, 2^3145909 is an apocalyptic number.

It is an amenable number.

3145909 is a deficient number, since it is larger than the sum of its proper divisors (242007).

3145909 is a wasteful number, since it uses less digits than its factorization.

3145909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242006.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 3145909 is about 1773.6710518019. The cubic root of 3145909 is about 146.5262332316.

The spelling of 3145909 in words is "three million, one hundred forty-five thousand, nine hundred nine".