2145005 has 16 divisors (see below), whose sum is σ = 2758080. Its totient is φ = 1596672.

The previous prime is 2144999. The next prime is 2145023. The reversal of 2145005 is 5005412.

It is a cyclic number.

It is not a de Polignac number, because 2145005 - 2⁸ = 2144749 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6197 + ... + 6533.

It is an arithmetic number, because the mean of its divisors is an integer number (172380).

2^2145005 is an apocalyptic number.

It is an amenable number.

2145005 is a deficient number, since it is larger than the sum of its proper divisors (613075).

2145005 is a wasteful number, since it uses less digits than its factorization.

2145005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 2145005 is about 1464.5835585585. The cubic root of 2145005 is about 128.9662592285.

The spelling of 2145005 in words is "two million, one hundred forty-five thousand, five".