4188121 has 4 divisors (see below), whose sum is σ = 4786432. Its totient is φ = 3589812.

The previous prime is 4188101. The next prime is 4188127. The reversal of 4188121 is 1218814.

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: 1218814 = 2 ⋅609407.

It is a cyclic number.

It is not a de Polignac number, because 4188121 - 2⁵ = 4188089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4188127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299145 + ... + 299158.

It is an arithmetic number, because the mean of its divisors is an integer number (1196608).

Almost surely, 2^4188121 is an apocalyptic number.

It is an amenable number.

4188121 is a deficient number, since it is larger than the sum of its proper divisors (598311).

4188121 is an equidigital number, since it uses as much as digits as its factorization.

4188121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598310.

The product of its digits is 512, while the sum is 25.

The square root of 4188121 is about 2046.4899217929. The cubic root of 4188121 is about 161.1906105030.

The spelling of 4188121 in words is "four million, one hundred eighty-eight thousand, one hundred twenty-one".