4291020 has 72 divisors (see below), whose sum is σ = 13453440. Its totient is φ = 1105920.

The previous prime is 4290997. The next prime is 4291031. The reversal of 4291020 is 201924.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 4290984 and 4291002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5196 + ... + 5964.

Almost surely, 2^4291020 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 4291020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6726720).

4291020 is an abundant number, since it is smaller than the sum of its proper divisors (9162420).

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

4291020 is a wasteful number, since it uses less digits than its factorization.

4291020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 4291020 is about 2071.4777334068. The cubic root of 4291020 is about 162.5000552268.

Adding to 4291020 its reverse (201924), we get a palindrome (4492944).

It can be divided in two parts, 429 and 1020, that multiplied together give a triangular number (437580 = T₉₃₅).

The spelling of 4291020 in words is "four million, two hundred ninety-one thousand, twenty".