4015885121 has 2 divisors, whose sum is σ = 4015885122. Its totient is φ = 4015885120.

The previous prime is 4015885117. The next prime is 4015885177. The reversal of 4015885121 is 1215885104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4002460225 + 13424896 = 63265^2 + 3664^2 .

It is a cyclic number.

It is not a de Polignac number, because 4015885121 - 2² = 4015885117 is a prime.

It is a super-2 number, since 2×4015885121² = 32254666610138369282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4015815121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2007942560 + 2007942561.

It is an arithmetic number, because the mean of its divisors is an integer number (2007942561).

Almost surely, 2^4015885121 is an apocalyptic number.

It is an amenable number.

4015885121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4015885121 is an equidigital number, since it uses as much as digits as its factorization.

4015885121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12800, while the sum is 35.

The square root of 4015885121 is about 63371.0116772646. The cubic root of 4015885121 is about 1589.4996145704.

The spelling of 4015885121 in words is "four billion, fifteen million, eight hundred eighty-five thousand, one hundred twenty-one".