4021930 has 16 divisors (see below), whose sum is σ = 7897824. Its totient is φ = 1462480.

The previous prime is 4021907. The next prime is 4021933. The reversal of 4021930 is 391204.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 4021898 and 4021907.

It is not an unprimeable number, because it can be changed into a prime (4021933) 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, 18172 + ... + 18391.

It is an arithmetic number, because the mean of its divisors is an integer number (493614).

Almost surely, 2^4021930 is an apocalyptic number.

4021930 is a deficient number, since it is larger than the sum of its proper divisors (3875894).

4021930 is a wasteful number, since it uses less digits than its factorization.

4021930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36581.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 4021930 is about 2005.4750060771. The cubic root of 4021930 is about 159.0296741947.

It can be divided in two parts, 402 and 1930, that added together give a palindrome (2332).

The spelling of 4021930 in words is "four million, twenty-one thousand, nine hundred thirty".