4200121 has 4 divisors (see below), whose sum is σ = 4421200. Its totient is φ = 3979044.

The previous prime is 4200113. The next prime is 4200127. The reversal of 4200121 is 1210024.

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.

It is a cyclic number.

It is not a de Polignac number, because 4200121 - 2³ = 4200113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4200098 and 4200107.

It is not an unprimeable number, because it can be changed into a prime (4200127) 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, 110511 + ... + 110548.

It is an arithmetic number, because the mean of its divisors is an integer number (1105300).

Almost surely, 2^4200121 is an apocalyptic number.

It is an amenable number.

4200121 is a deficient number, since it is larger than the sum of its proper divisors (221079).

4200121 is a wasteful number, since it uses less digits than its factorization.

4200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221078.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 4200121 is about 2049.4196739565. The cubic root of 4200121 is about 161.3444139913.

Adding to 4200121 its reverse (1210024), we get a palindrome (5410145).

The spelling of 4200121 in words is "four million, two hundred thousand, one hundred twenty-one".