4250440121 has 4 divisors (see below), whose sum is σ = 4268077044. Its totient is φ = 4232803200.

The previous prime is 4250440093. The next prime is 4250440133. The reversal of 4250440121 is 1210440524.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2909415721 + 1341024400 = 53939^2 + 36620^2 .

It is a cyclic number.

It is not a de Polignac number, because 4250440121 - 2⁶ = 4250440057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4250440141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8818100 + ... + 8818581.

It is an arithmetic number, because the mean of its divisors is an integer number (1067019261).

Almost surely, 2^4250440121 is an apocalyptic number.

It is an amenable number.

4250440121 is a deficient number, since it is larger than the sum of its proper divisors (17636923).

4250440121 is a wasteful number, since it uses less digits than its factorization.

4250440121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17636922.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 4250440121 is about 65195.3995386178. The cubic root of 4250440121 is about 1619.8618132650.

Adding to 4250440121 its reverse (1210440524), we get a palindrome (5460880645).

The spelling of 4250440121 in words is "four billion, two hundred fifty million, four hundred forty thousand, one hundred twenty-one".