3912121 has 4 divisors (see below), whose sum is σ = 4017892. Its totient is φ = 3806352.

The previous prime is 3912109. The next prime is 3912127. The reversal of 3912121 is 1212193.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1212193 = 31 ⋅39103.

It can be written as a sum of positive squares in 2 ways, for example, as 2890000 + 1022121 = 1700^2 + 1011^2 .

It is a cyclic number.

It is not a de Polignac number, because 3912121 - 2¹³ = 3903929 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3912127) 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, 52830 + ... + 52903.

It is an arithmetic number, because the mean of its divisors is an integer number (1004473).

Almost surely, 2^3912121 is an apocalyptic number.

It is an amenable number.

3912121 is a deficient number, since it is larger than the sum of its proper divisors (105771).

3912121 is a wasteful number, since it uses less digits than its factorization.

3912121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105770.

The product of its digits is 108, while the sum is 19.

The square root of 3912121 is about 1977.9082385187. The cubic root of 3912121 is about 157.5689930367.

The spelling of 3912121 in words is "three million, nine hundred twelve thousand, one hundred twenty-one".