3921101 has 4 divisors (see below), whose sum is σ = 4151772. Its totient is φ = 3690432.

The previous prime is 3921089. The next prime is 3921121. The reversal of 3921101 is 1011293.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1011293 = 53 ⋅19081.

It can be written as a sum of positive squares in 2 ways, for example, as 2418025 + 1503076 = 1555^2 + 1226^2 .

It is a cyclic number.

It is not a de Polignac number, because 3921101 - 2⁶ = 3921037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 230653 = 3921101 / (3 + 9 + 2 + 1 + 1 + 0 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3921101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921121) 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, 115310 + ... + 115343.

It is an arithmetic number, because the mean of its divisors is an integer number (1037943).

Almost surely, 2^3921101 is an apocalyptic number.

It is an amenable number.

3921101 is a deficient number, since it is larger than the sum of its proper divisors (230671).

3921101 is a wasteful number, since it uses less digits than its factorization.

3921101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230670.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 3921101 is about 1980.1770122896. The cubic root of 3921101 is about 157.6894637721.

Adding to 3921101 its reverse (1011293), we get a palindrome (4932394).

The spelling of 3921101 in words is "three million, nine hundred twenty-one thousand, one hundred one".