404421502144042 has 4 divisors (see below), whose sum is σ = 606632253216066. Its totient is φ = 202210751072020.

The previous prime is 404421502143983. The next prime is 404421502144067. The reversal of 404421502144042 is 240441205124404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 399502594728721 + 4918907415321 = 19987561^2 + 2217861^2 .

It is a junction number, because it is equal to n+sod(n) for n = 404421502143992 and 404421502144010.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101105375536009 + ... + 101105375536012.

Almost surely, 2^{404421502144042} is an apocalyptic number.

404421502144042 is a deficient number, since it is larger than the sum of its proper divisors (202210751072024).

404421502144042 is a wasteful number, since it uses less digits than its factorization.

404421502144042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202210751072023.

The product of its (nonzero) digits is 163840, while the sum is 37.

Adding to 404421502144042 its reverse (240441205124404), we get a palindrome (644862707268446).

The spelling of 404421502144042 in words is "four hundred four trillion, four hundred twenty-one billion, five hundred two million, one hundred forty-four thousand, forty-two".