2145045 has 32 divisors (see below), whose sum is σ = 4055040. Its totient is φ = 947520.

The previous prime is 2145023. The next prime is 2145047. The reversal of 2145045 is 5405412.

It is not a de Polignac number, because 2145045 - 2⁸ = 2144789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

2145045 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2926 + ... + 3584.

It is an arithmetic number, because the mean of its divisors is an integer number (126720).

2^2145045 is an apocalyptic number.

It is an amenable number.

2145045 is a deficient number, since it is larger than the sum of its proper divisors (1909995).

2145045 is a wasteful number, since it uses less digits than its factorization.

2145045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 2145045 is about 1464.5972142538. The cubic root of 2145045 is about 128.9670608767.

The spelling of 2145045 in words is "two million, one hundred forty-five thousand, forty-five".