4142405261 has 2 divisors, whose sum is σ = 4142405262. Its totient is φ = 4142405260.

The previous prime is 4142405243. The next prime is 4142405299. The reversal of 4142405261 is 1625042414.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2293835236 + 1848570025 = 47894^2 + 42995^2 .

It is a cyclic number.

It is not a de Polignac number, because 4142405261 - 2¹⁰ = 4142404237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4142435261) 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, 2071202630 + 2071202631.

It is an arithmetic number, because the mean of its divisors is an integer number (2071202631).

Almost surely, 2^4142405261 is an apocalyptic number.

It is an amenable number.

4142405261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4142405261 is an equidigital number, since it uses as much as digits as its factorization.

4142405261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 4142405261 is about 64361.5200333243. The cubic root of 4142405261 is about 1606.0196754820.

Adding to 4142405261 its reverse (1625042414), we get a palindrome (5767447675).

The spelling of 4142405261 in words is "four billion, one hundred forty-two million, four hundred five thousand, two hundred sixty-one".