404127121 has 8 divisors (see below), whose sum is σ = 407599560. Its totient is φ = 400662528.

The previous prime is 404127109. The next prime is 404127221. The reversal of 404127121 is 121721404.

It can be written as a sum of positive squares in 4 ways, for example, as 318096 + 403809025 = 564^2 + 20095^2 .

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

It is not a de Polignac number, because 404127121 - 2⁹ = 404126609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404127092 and 404127101.

It is not an unprimeable number, because it can be changed into a prime (404127221) 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, 148945 + ... + 151633.

It is an arithmetic number, because the mean of its divisors is an integer number (50949945).

Almost surely, 2^404127121 is an apocalyptic number.

It is an amenable number.

404127121 is a deficient number, since it is larger than the sum of its proper divisors (3472439).

404127121 is a wasteful number, since it uses less digits than its factorization.

404127121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3923.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 404127121 is about 20102.9132465919. The cubic root of 404127121 is about 739.3317079467.

Adding to 404127121 its reverse (121721404), we get a palindrome (525848525).

The spelling of 404127121 in words is "four hundred four million, one hundred twenty-seven thousand, one hundred twenty-one".