404042101 has 8 divisors (see below), whose sum is σ = 411927008. Its totient is φ = 396198000.

The previous prime is 404042071. The next prime is 404042113. The reversal of 404042101 is 101240404.

404042101 = 1759² + 1760² + ... + 1880².

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

It is a cyclic number.

It is not a de Polignac number, because 404042101 - 2⁵ = 404042069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404042131) 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 7 ways as a sum of consecutive naturals, for example, 10186 + ... + 30196.

It is an arithmetic number, because the mean of its divisors is an integer number (51490876).

Almost surely, 2^404042101 is an apocalyptic number.

It is an amenable number.

404042101 is a deficient number, since it is larger than the sum of its proper divisors (7884907).

404042101 is a wasteful number, since it uses less digits than its factorization.

404042101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20403.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 404042101 is about 20100.7985164769. The cubic root of 404042101 is about 739.2798576030.

Adding to 404042101 its reverse (101240404), we get a palindrome (505282505).

The spelling of 404042101 in words is "four hundred four million, forty-two thousand, one hundred one".