2019045 has 48 divisors (see below), whose sum is σ = 3907008. Its totient is φ = 887040.

The previous prime is 2019041. The next prime is 2019047. The reversal of 2019045 is 5409102.

2019045 is a nontrivial binomial coefficient, being equal to C(2010, 2).

It is not a de Polignac number, because 2019045 - 2² = 2019041 is a prime.

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

2019045 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2019041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30102 + ... + 30168.

It is an arithmetic number, because the mean of its divisors is an integer number (81396).

2^2019045 is an apocalyptic number.

2019045 is the 2009-th triangular number and also the 1005-th hexagonal number.

It is an amenable number.

2019045 is a deficient number, since it is larger than the sum of its proper divisors (1887963).

2019045 is a wasteful number, since it uses less digits than its factorization.

2019045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 2019045 is about 1420.9310328091. The cubic root of 2019045 is about 126.3907621901.

The spelling of 2019045 in words is "two million, nineteen thousand, forty-five".