400120420143 has 16 divisors (see below), whose sum is σ = 552020814720. Its totient is φ = 257487838944.

The previous prime is 400120420129. The next prime is 400120420159. The reversal of 400120420143 is 341024021004.

It is not a de Polignac number, because 400120420143 - 2⁸ = 400120419887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400120420643) 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 15 ways as a sum of consecutive naturals, for example, 172821 + ... + 911102.

It is an arithmetic number, because the mean of its divisors is an integer number (34501300920).

Almost surely, 2^400120420143 is an apocalyptic number.

400120420143 is a deficient number, since it is larger than the sum of its proper divisors (151900394577).

400120420143 is a wasteful number, since it uses less digits than its factorization.

400120420143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088198.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 400120420143 its reverse (341024021004), we get a palindrome (741144441147).

The spelling of 400120420143 in words is "four hundred billion, one hundred twenty million, four hundred twenty thousand, one hundred forty-three".