4001158261 has 2 divisors, whose sum is σ = 4001158262. Its totient is φ = 4001158260.

The previous prime is 4001158243. The next prime is 4001158289. The reversal of 4001158261 is 1628511004.

It is an a-pointer prime, because the next prime (4001158289) can be obtained adding 4001158261 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2451240100 + 1549918161 = 49510^2 + 39369^2 .

It is a cyclic number.

It is not a de Polignac number, because 4001158261 - 2¹⁵ = 4001125493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4001158661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000579130 + 2000579131.

It is an arithmetic number, because the mean of its divisors is an integer number (2000579131).

Almost surely, 2^4001158261 is an apocalyptic number.

It is an amenable number.

4001158261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4001158261 is an equidigital number, since it uses as much as digits as its factorization.

4001158261 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 28.

The square root of 4001158261 is about 63254.7093977990. The cubic root of 4001158261 is about 1587.5542559091.

Adding to 4001158261 its reverse (1628511004), we get a palindrome (5629669265).

The spelling of 4001158261 in words is "four billion, one million, one hundred fifty-eight thousand, two hundred sixty-one".