2145284 has 24 divisors (see below), whose sum is σ = 3913728. Its totient is φ = 1028160.

The previous prime is 2145277. The next prime is 2145287. The reversal of 2145284 is 4825412.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145287) 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 7 ways as a sum of consecutive naturals, for example, 16829 + ... + 16955.

It is an arithmetic number, because the mean of its divisors is an integer number (163072).

2^2145284 is an apocalyptic number.

It is an amenable number.

2145284 is a deficient number, since it is larger than the sum of its proper divisors (1768444).

2145284 is a wasteful number, since it uses less digits than its factorization.

2145284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 273 counting only the distinct ones).

The product of its digits is 2560, while the sum is 26.

The square root of 2145284 is about 1464.6788043800. The cubic root of 2145284 is about 128.9718505171.

The spelling of 2145284 in words is "two million, one hundred forty-five thousand, two hundred eighty-four".