4020121 has 8 divisors (see below), whose sum is σ = 4615424. Its totient is φ = 3430080.

The previous prime is 4020119. The next prime is 4020139. The reversal of 4020121 is 1210204.

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 4020121 - 2¹ = 4020119 is a prime.

It is a super-2 number, since 2×4020121² = 32322745709282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4020098 and 4020107.

It is not an unprimeable number, because it can be changed into a prime (4020151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 496 + ... + 2878.

It is an arithmetic number, because the mean of its divisors is an integer number (576928).

Almost surely, 2^4020121 is an apocalyptic number.

It is an amenable number.

4020121 is a deficient number, since it is larger than the sum of its proper divisors (595303).

4020121 is a wasteful number, since it uses less digits than its factorization.

4020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631.

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

The square root of 4020121 is about 2005.0239400067. The cubic root of 4020121 is about 159.0058276149.

Adding to 4020121 its reverse (1210204), we get a palindrome (5230325).

The spelling of 4020121 in words is "four million, twenty thousand, one hundred twenty-one".