4202121 has 16 divisors (see below), whose sum is σ = 6985728. Its totient is φ = 2182800.

The previous prime is 4202117. The next prime is 4202141. The reversal of 4202121 is 1212024.

It is not a de Polignac number, because 4202121 - 2² = 4202117 is a prime.

4202121 is a modest number, since divided by 2121 gives 420 as remainder.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4202097 and 4202106.

It is not an unprimeable number, because it can be changed into a prime (4202141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8865 + ... + 9326.

It is an arithmetic number, because the mean of its divisors is an integer number (436608).

Almost surely, 2^4202121 is an apocalyptic number.

It is an amenable number.

4202121 is a deficient number, since it is larger than the sum of its proper divisors (2783607).

4202121 is a wasteful number, since it uses less digits than its factorization.

4202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18212.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 4202121 is about 2049.9075588914. The cubic root of 4202121 is about 161.3700194141.

Adding to 4202121 its reverse (1212024), we get a palindrome (5414145).

The spelling of 4202121 in words is "four million, two hundred two thousand, one hundred twenty-one".