4042121 has 8 divisors (see below), whose sum is σ = 4217088. Its totient is φ = 3870000.

The previous prime is 4042111. The next prime is 4042153. The reversal of 4042121 is 1212404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4042121 - 2⁶ = 4042057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4042096 and 4042105.

It is not an unprimeable number, because it can be changed into a prime (4042111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2486 + ... + 3776.

It is an arithmetic number, because the mean of its divisors is an integer number (527136).

Almost surely, 2^4042121 is an apocalyptic number.

It is an amenable number.

4042121 is a deficient number, since it is larger than the sum of its proper divisors (174967).

4042121 is a wasteful number, since it uses less digits than its factorization.

4042121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 4042121 is about 2010.5026734625. The cubic root of 4042121 is about 159.2953517695.

Adding to 4042121 its reverse (1212404), we get a palindrome (5254525).

The spelling of 4042121 in words is "four million, forty-two thousand, one hundred twenty-one".