4095921 has 4 divisors (see below), whose sum is σ = 5461232. Its totient is φ = 2730612.

The previous prime is 4095901. The next prime is 4095953. The reversal of 4095921 is 1295904.

It is a happy number.

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 not a de Polignac number, because 4095921 - 2⁶ = 4095857 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4095901) 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, 682651 + ... + 682656.

It is an arithmetic number, because the mean of its divisors is an integer number (1365308).

Almost surely, 2^4095921 is an apocalyptic number.

It is an amenable number.

4095921 is a deficient number, since it is larger than the sum of its proper divisors (1365311).

4095921 is a wasteful number, since it uses less digits than its factorization.

4095921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365310.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 4095921 is about 2023.8381852312. The cubic root of 4095921 is about 159.9989713476.

The spelling of 4095921 in words is "four million, ninety-five thousand, nine hundred twenty-one".