4021964 has 12 divisors (see below), whose sum is σ = 7344624. Its totient is φ = 1923504.

The previous prime is 4021961. The next prime is 4021967. The reversal of 4021964 is 4691204.

It is an interprime number because it is at equal distance from previous prime (4021961) and next prime (4021967).

It is not an unprimeable number, because it can be changed into a prime (4021961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21767 + ... + 21950.

It is an arithmetic number, because the mean of its divisors is an integer number (612052).

Almost surely, 2^4021964 is an apocalyptic number.

It is an amenable number.

4021964 is a deficient number, since it is larger than the sum of its proper divisors (3322660).

4021964 is a wasteful number, since it uses less digits than its factorization.

4021964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43744 (or 43742 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 4021964 is about 2005.4834828539. The cubic root of 4021964 is about 159.0301223206.

The spelling of 4021964 in words is "four million, twenty-one thousand, nine hundred sixty-four".