4203121 has 16 divisors (see below), whose sum is σ = 4740736. Its totient is φ = 3701376.

The previous prime is 4203119. The next prime is 4203127. The reversal of 4203121 is 1213024.

It is a cyclic number.

It is not a de Polignac number, because 4203121 - 2¹ = 4203119 is a prime.

It is a super-2 number, since 2×4203121² = 35332452281282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (4203127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40756 + ... + 40858.

It is an arithmetic number, because the mean of its divisors is an integer number (296296).

Almost surely, 2^4203121 is an apocalyptic number.

It is an amenable number.

4203121 is a deficient number, since it is larger than the sum of its proper divisors (537615).

4203121 is a wasteful number, since it uses less digits than its factorization.

4203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 4203121 is about 2050.1514578196. The cubic root of 4203121 is about 161.3828190789.

Adding to 4203121 its reverse (1213024), we get a palindrome (5416145).

The spelling of 4203121 in words is "four million, two hundred three thousand, one hundred twenty-one".