4000126861 has 8 divisors (see below), whose sum is σ = 4165839000. Its totient is φ = 3836266560.

The previous prime is 4000126859. The next prime is 4000126883. The reversal of 4000126861 is 1686210004.

It can be written as a sum of positive squares in 4 ways, for example, as 754545961 + 3245580900 = 27469^2 + 56970^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4000126861 - 2¹ = 4000126859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000126831) 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 7 ways as a sum of consecutive naturals, for example, 458550 + ... + 467191.

It is an arithmetic number, because the mean of its divisors is an integer number (520729875).

Almost surely, 2^4000126861 is an apocalyptic number.

It is an amenable number.

4000126861 is a deficient number, since it is larger than the sum of its proper divisors (165712139).

4000126861 is a wasteful number, since it uses less digits than its factorization.

4000126861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925919.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 4000126861 is about 63246.5561196813. The cubic root of 4000126861 is about 1587.4178333979.

Adding to 4000126861 its reverse (1686210004), we get a palindrome (5686336865).

The spelling of 4000126861 in words is "four billion, one hundred twenty-six thousand, eight hundred sixty-one".