404242143 has 16 divisors (see below), whose sum is σ = 548560896. Its totient is φ = 264751200.

The previous prime is 404242129. The next prime is 404242169. The reversal of 404242143 is 341242404.

It is a happy number.

It is not a de Polignac number, because 404242143 - 2⁴ = 404242127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404242123) 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, 34093 + ... + 44393.

It is an arithmetic number, because the mean of its divisors is an integer number (34285056).

Almost surely, 2^404242143 is an apocalyptic number.

404242143 is a deficient number, since it is larger than the sum of its proper divisors (144318753).

404242143 is a wasteful number, since it uses less digits than its factorization.

404242143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10534.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 404242143 is about 20105.7738721990. The cubic root of 404242143 is about 739.4018437535.

Adding to 404242143 its reverse (341242404), we get a palindrome (745484547).

The spelling of 404242143 in words is "four hundred four million, two hundred forty-two thousand, one hundred forty-three".