4108921 has 4 divisors (see below), whose sum is σ = 4325200. Its totient is φ = 3892644.

The previous prime is 4108919. The next prime is 4108963. The reversal of 4108921 is 1298014.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1298014 = 2 ⋅649007.

It is not a de Polignac number, because 4108921 - 2¹ = 4108919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4108991) 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, 108111 + ... + 108148.

It is an arithmetic number, because the mean of its divisors is an integer number (1081300).

Almost surely, 2^4108921 is an apocalyptic number.

It is an amenable number.

4108921 is a deficient number, since it is larger than the sum of its proper divisors (216279).

4108921 is a wasteful number, since it uses less digits than its factorization.

4108921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216278.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 4108921 is about 2027.0473600782. The cubic root of 4108921 is about 160.1680655879.

The spelling of 4108921 in words is "four million, one hundred eight thousand, nine hundred twenty-one".