404143242 has 8 divisors (see below), whose sum is σ = 808286496. Its totient is φ = 134714412.

The previous prime is 404143237. The next prime is 404143247. The reversal of 404143242 is 242341404.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (404143237) and next prime (404143247).

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

404143242 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (404143247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33678598 + ... + 33678609.

It is an arithmetic number, because the mean of its divisors is an integer number (101035812).

Almost surely, 2^404143242 is an apocalyptic number.

404143242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404143242 is a wasteful number, since it uses less digits than its factorization.

404143242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67357212.

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

The square root of 404143242 is about 20103.3142043793. The cubic root of 404143242 is about 739.3415386883.

Adding to 404143242 its reverse (242341404), we get a palindrome (646484646).

The spelling of 404143242 in words is "four hundred four million, one hundred forty-three thousand, two hundred forty-two".