3842121 has 4 divisors (see below), whose sum is σ = 5122832. Its totient is φ = 2561412.

The previous prime is 3842101. The next prime is 3842143. The reversal of 3842121 is 1212483.

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: 1212483 = 3 ⋅404161.

It is not a de Polignac number, because 3842121 - 2⁵ = 3842089 is a prime.

It is a super-4 number, since 4×3842121⁴ (a number of 27 digits) contains 4444 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3842101) 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, 640351 + ... + 640356.

It is an arithmetic number, because the mean of its divisors is an integer number (1280708).

Almost surely, 2^3842121 is an apocalyptic number.

It is an amenable number.

3842121 is a deficient number, since it is larger than the sum of its proper divisors (1280711).

3842121 is a wasteful number, since it uses less digits than its factorization.

3842121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280710.

The product of its digits is 384, while the sum is 21.

The square root of 3842121 is about 1960.1329036573. The cubic root of 3842121 is about 156.6235317091.

The spelling of 3842121 in words is "three million, eight hundred forty-two thousand, one hundred twenty-one".