2175149 has 4 divisors (see below), whose sum is σ = 2191164. Its totient is φ = 2159136.

The previous prime is 2175127. The next prime is 2175161. The reversal of 2175149 is 9415712.

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 1909924 + 265225 = 1382^2 + 515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2175149 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 (2175109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7802 + ... + 8075.

It is an arithmetic number, because the mean of its divisors is an integer number (547791).

2^2175149 is an apocalyptic number.

It is an amenable number.

2175149 is a deficient number, since it is larger than the sum of its proper divisors (16015).

2175149 is a wasteful number, since it uses less digits than its factorization.

2175149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16014.

The product of its digits is 2520, while the sum is 29.

The square root of 2175149 is about 1474.8386352412. The cubic root of 2175149 is about 129.5675770198.

The spelling of 2175149 in words is "two million, one hundred seventy-five thousand, one hundred forty-nine".