4021770 has 16 divisors (see below), whose sum is σ = 9652320. Its totient is φ = 1072464.

The previous prime is 4021769. The next prime is 4021777. The reversal of 4021770 is 771204.

It is not an unprimeable number, because it can be changed into a prime (4021777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67000 + ... + 67059.

It is an arithmetic number, because the mean of its divisors is an integer number (603270).

Almost surely, 2^4021770 is an apocalyptic number.

4021770 is an abundant number, since it is smaller than the sum of its proper divisors (5630550).

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

4021770 is a wasteful number, since it uses less digits than its factorization.

4021770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134069.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 4021770 is about 2005.4351148816. The cubic root of 4021770 is about 159.0275653328.

Adding to 4021770 its reverse (771204), we get a palindrome (4792974).

The spelling of 4021770 in words is "four million, twenty-one thousand, seven hundred seventy".