4045020 has 48 divisors (see below), whose sum is σ = 12945408. Its totient is φ = 924480.

The previous prime is 4045009. The next prime is 4045049. The reversal of 4045020 is 205404.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 4396 + ... + 5235.

It is an arithmetic number, because the mean of its divisors is an integer number (269696).

Almost surely, 2^4045020 is an apocalyptic number.

It is an amenable number.

4045020 is an abundant number, since it is smaller than the sum of its proper divisors (8900388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4045020 is a wasteful number, since it uses less digits than its factorization.

4045020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9650 (or 9648 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 4045020 is about 2011.2235082158. The cubic root of 4045020 is about 159.3334247571. Note that the first 3 decimals are identical.

It can be divided in two parts, 40450 and 20, that added together give a triangular number (40470 = T₂₈₄).

The spelling of 4045020 in words is "four million, forty-five thousand, twenty".