4020961 has 4 divisors (see below), whose sum is σ = 4595392. Its totient is φ = 3446532.

The previous prime is 4020949. The next prime is 4020977. The reversal of 4020961 is 1690204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4020961 - 2⁷ = 4020833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4020361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287205 + ... + 287218.

It is an arithmetic number, because the mean of its divisors is an integer number (1148848).

Almost surely, 2^4020961 is an apocalyptic number.

It is an amenable number.

4020961 is a deficient number, since it is larger than the sum of its proper divisors (574431).

4020961 is an equidigital number, since it uses as much as digits as its factorization.

4020961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574430.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 4020961 is about 2005.2334028736. The cubic root of 4020961 is about 159.0169015431.

The spelling of 4020961 in words is "four million, twenty thousand, nine hundred sixty-one".