401002143 has 16 divisors (see below), whose sum is σ = 552794112. Its totient is φ = 258300000.

The previous prime is 401002123. The next prime is 401002153. The reversal of 401002143 is 341200104.

It is not a de Polignac number, because 401002143 - 2¹² = 400998047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401002123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62118 + ... + 68268.

It is an arithmetic number, because the mean of its divisors is an integer number (34549632).

Almost surely, 2^401002143 is an apocalyptic number.

401002143 is a deficient number, since it is larger than the sum of its proper divisors (151791969).

401002143 is a wasteful number, since it uses less digits than its factorization.

401002143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6886.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 401002143 is about 20025.0379025859. The cubic root of 401002143 is about 737.4211076387.

Adding to 401002143 its reverse (341200104), we get a palindrome (742202247).

The spelling of 401002143 in words is "four hundred one million, two thousand, one hundred forty-three".