401005143 has 48 divisors (see below), whose sum is σ = 739005696. Its totient is φ = 203454720.

The previous prime is 401005141. The next prime is 401005147. The reversal of 401005143 is 341500104.

It is a happy number.

It is not a de Polignac number, because 401005143 - 2¹ = 401005141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401005141) 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 47 ways as a sum of consecutive naturals, for example, 23071 + ... + 36527.

It is an arithmetic number, because the mean of its divisors is an integer number (15395952).

Almost surely, 2^401005143 is an apocalyptic number.

401005143 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

401005143 is a deficient number, since it is larger than the sum of its proper divisors (338000553).

401005143 is a wasteful number, since it uses less digits than its factorization.

401005143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13524 (or 13521 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 401005143 is about 20025.1128086710. The cubic root of 401005143 is about 737.4229465797.

Adding to 401005143 its reverse (341500104), we get a palindrome (742505247).

The spelling of 401005143 in words is "four hundred one million, five thousand, one hundred forty-three".