2109145 has 8 divisors (see below), whose sum is σ = 2554056. Its totient is φ = 1671936.

The previous prime is 2109127. The next prime is 2109161. The reversal of 2109145 is 5419012.

It can be written as a sum of positive squares in 4 ways, for example, as 841 + 2108304 = 29^2 + 1452^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2109145 - 2¹³ = 2100953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1302 + ... + 2431.

It is an arithmetic number, because the mean of its divisors is an integer number (319257).

2^2109145 is an apocalyptic number.

It is an amenable number.

2109145 is a deficient number, since it is larger than the sum of its proper divisors (444911).

2109145 is a wasteful number, since it uses less digits than its factorization.

2109145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3851.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 2109145 is about 1452.2895716764. The cubic root of 2109145 is about 128.2435345636.

The spelling of 2109145 in words is "two million, one hundred nine thousand, one hundred forty-five".