4102020 has 72 divisors (see below), whose sum is σ = 13407576. Its totient is φ = 1009152.

The previous prime is 4101991. The next prime is 4102037. The reversal of 4102020 is 202014.

4102020 = T₃₁ + T₃₂ + ... + T₂₉₀.

It can be written as a sum of positive squares in 4 ways, for example, as 133956 + 3968064 = 366^2 + 1992^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 4101993 and 4102011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1464 + ... + 3216.

Almost surely, 2^4102020 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 4102020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6703788).

4102020 is an abundant number, since it is smaller than the sum of its proper divisors (9305556).

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

4102020 is a wasteful number, since it uses less digits than its factorization.

4102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781 (or 1776 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 4102020 is about 2025.3444151551. The cubic root of 4102020 is about 160.0783470463.

Adding to 4102020 its reverse (202014), we get a palindrome (4304034).

The spelling of 4102020 in words is "four million, one hundred two thousand, twenty".