2145249 has 6 divisors (see below), whose sum is σ = 3098706. Its totient is φ = 1430160.

The previous prime is 2145239. The next prime is 2145263. The reversal of 2145249 is 9425412.

2145249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2117025 + 28224 = 1455^2 + 168^2 .

It is not a de Polignac number, because 2145249 - 2⁸ = 2144993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2145239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119172 + ... + 119189.

It is an arithmetic number, because the mean of its divisors is an integer number (516451).

2^2145249 is an apocalyptic number.

It is an amenable number.

2145249 is a deficient number, since it is larger than the sum of its proper divisors (953457).

2145249 is a wasteful number, since it uses less digits than its factorization.

2145249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238367 (or 238364 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2145249 is about 1464.6668563192. Note that the first 3 decimals coincide. The cubic root of 2145249 is about 128.9711491276.

The spelling of 2145249 in words is "two million, one hundred forty-five thousand, two hundred forty-nine".