4521020 has 48 divisors (see below), whose sum is σ = 11117568. Its totient is φ = 1512000.

The previous prime is 4521001. The next prime is 4521037. The reversal of 4521020 is 201254.

4521020 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 4520986 and 4521004.

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, 5645 + ... + 6395.

It is an arithmetic number, because the mean of its divisors is an integer number (231616).

Almost surely, 2^4521020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4521020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5558784).

4521020 is an abundant number, since it is smaller than the sum of its proper divisors (6596548).

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

4521020 is a wasteful number, since it uses less digits than its factorization.

4521020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810 (or 808 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 4521020 is about 2126.2690328366. The cubic root of 4521020 is about 165.3530243775.

Adding to 4521020 its reverse (201254), we get a palindrome (4722274).

The spelling of 4521020 in words is "four million, five hundred twenty-one thousand, twenty".