404520142 has 16 divisors (see below), whose sum is σ = 654357312. Its totient is φ = 186444000.

The previous prime is 404520133. The next prime is 404520143. The reversal of 404520142 is 241025404.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404520143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9168 + ... + 29884.

It is an arithmetic number, because the mean of its divisors is an integer number (40897332).

Almost surely, 2^404520142 is an apocalyptic number.

404520142 is a deficient number, since it is larger than the sum of its proper divisors (249837170).

404520142 is a wasteful number, since it uses less digits than its factorization.

404520142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21483.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 404520142 is about 20112.6860960937. The cubic root of 404520142 is about 739.5713014864.

Adding to 404520142 its reverse (241025404), we get a palindrome (645545546).

The spelling of 404520142 in words is "four hundred four million, five hundred twenty thousand, one hundred forty-two".