4006241521 has 2 divisors, whose sum is σ = 4006241522. Its totient is φ = 4006241520.

The previous prime is 4006241497. The next prime is 4006241567. The reversal of 4006241521 is 1251426004.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2193610896 + 1812630625 = 46836^2 + 42575^2 .

It is a cyclic number.

It is not a de Polignac number, because 4006241521 - 2¹⁵ = 4006208753 is a prime.

It is a super-2 number, since 2×4006241521² = 32099942249168786882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4006241581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2003120760 + 2003120761.

It is an arithmetic number, because the mean of its divisors is an integer number (2003120761).

Almost surely, 2^4006241521 is an apocalyptic number.

It is an amenable number.

4006241521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4006241521 is an equidigital number, since it uses as much as digits as its factorization.

4006241521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 4006241521 is about 63294.8775257524. The cubic root of 4006241521 is about 1588.2262726477.

Adding to 4006241521 its reverse (1251426004), we get a palindrome (5257667525).

The spelling of 4006241521 in words is "four billion, six million, two hundred forty-one thousand, five hundred twenty-one".