3904121 has 4 divisors (see below), whose sum is σ = 4204452. Its totient is φ = 3603792.

The previous prime is 3904111. The next prime is 3904123. The reversal of 3904121 is 1214093.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 156025 + 3748096 = 395^2 + 1936^2 .

It is a cyclic number.

It is not a de Polignac number, because 3904121 - 2⁶ = 3904057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3904093 and 3904102.

It is not an unprimeable number, because it can be changed into a prime (3904123) 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, 150146 + ... + 150171.

It is an arithmetic number, because the mean of its divisors is an integer number (1051113).

Almost surely, 2^3904121 is an apocalyptic number.

It is an amenable number.

3904121 is a deficient number, since it is larger than the sum of its proper divisors (300331).

3904121 is a wasteful number, since it uses less digits than its factorization.

3904121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300330.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 3904121 is about 1975.8848650668. The cubic root of 3904121 is about 157.4615140701.

The spelling of 3904121 in words is "three million, nine hundred four thousand, one hundred twenty-one".