4120921 has 4 divisors (see below), whose sum is σ = 4709632. Its totient is φ = 3532212.

The previous prime is 4120903. The next prime is 4120931. The reversal of 4120921 is 1290214.

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 4120921 - 2⁵ = 4120889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4120931) 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, 294345 + ... + 294358.

It is an arithmetic number, because the mean of its divisors is an integer number (1177408).

Almost surely, 2^4120921 is an apocalyptic number.

It is an amenable number.

4120921 is a deficient number, since it is larger than the sum of its proper divisors (588711).

4120921 is an equidigital number, since it uses as much as digits as its factorization.

4120921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588710.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 4120921 is about 2030.0051724072. The cubic root of 4120921 is about 160.3238363081.

It can be divided in two parts, 4120 and 921, that added together give a square (5041 = 71²).

The spelling of 4120921 in words is "four million, one hundred twenty thousand, nine hundred twenty-one".