4041545021 has 2 divisors, whose sum is σ = 4041545022. Its totient is φ = 4041545020.

The previous prime is 4041544907. The next prime is 4041545041. The reversal of 4041545021 is 1205451404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2434336921 + 1607208100 = 49339^2 + 40090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4041545021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4041545041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2020772510 + 2020772511.

It is an arithmetic number, because the mean of its divisors is an integer number (2020772511).

Almost surely, 2^4041545021 is an apocalyptic number.

It is an amenable number.

4041545021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4041545021 is an equidigital number, since it uses as much as digits as its factorization.

4041545021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 4041545021 is about 63573.1470119263. The cubic root of 4041545021 is about 1592.8778518619.

Adding to 4041545021 its reverse (1205451404), we get a palindrome (5246996425).

The spelling of 4041545021 in words is "four billion, forty-one million, five hundred forty-five thousand, twenty-one".