4005432261 has 40 divisors (see below), whose sum is σ = 6131854080. Its totient is φ = 2604444192.

The previous prime is 4005432259. The next prime is 4005432323. The reversal of 4005432261 is 1622345004.

4005432261 is a `hidden beast` number, since 40 + 0 + 543 + 22 + 61 = 666.

It is not a de Polignac number, because 4005432261 - 2¹ = 4005432259 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4005432251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1205160 + ... + 1208478.

It is an arithmetic number, because the mean of its divisors is an integer number (153296352).

Almost surely, 2^4005432261 is an apocalyptic number.

It is an amenable number.

4005432261 is a deficient number, since it is larger than the sum of its proper divisors (2126421819).

4005432261 is a wasteful number, since it uses less digits than its factorization.

4005432261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3695 (or 3686 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 4005432261 is about 63288.4844264737. The cubic root of 4005432261 is about 1588.1193249812.

Adding to 4005432261 its reverse (1622345004), we get a palindrome (5627777265).

The spelling of 4005432261 in words is "four billion, five million, four hundred thirty-two thousand, two hundred sixty-one".