4242043121 has 8 divisors (see below), whose sum is σ = 4390303080. Its totient is φ = 4093915392.

The previous prime is 4242043087. The next prime is 4242043123. The reversal of 4242043121 is 1213402424.

It can be written as a sum of positive squares in 4 ways, for example, as 1439823025 + 2802220096 = 37945^2 + 52936^2 .

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 4242043121 - 2¹⁰ = 4242042097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4242043123) 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, 34601 + ... + 98393.

It is an arithmetic number, because the mean of its divisors is an integer number (548787885).

Almost surely, 2^4242043121 is an apocalyptic number.

It is an amenable number.

4242043121 is a deficient number, since it is larger than the sum of its proper divisors (148259959).

4242043121 is a wasteful number, since it uses less digits than its factorization.

4242043121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66115.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 4242043121 is about 65130.9689855755. The cubic root of 4242043121 is about 1618.7943985755.

Adding to 4242043121 its reverse (1213402424), we get a palindrome (5455445545).

The spelling of 4242043121 in words is "four billion, two hundred forty-two million, forty-three thousand, one hundred twenty-one".