404500121 has 8 divisors (see below), whose sum is σ = 417905664. Its totient is φ = 391116960.

The previous prime is 404500099. The next prime is 404500141. The reversal of 404500121 is 121005404.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404500121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 404500121.

It is not an unprimeable number, because it can be changed into a prime (404500141) 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, 36221 + ... + 46053.

It is an arithmetic number, because the mean of its divisors is an integer number (52238208).

Almost surely, 2^404500121 is an apocalyptic number.

It is an amenable number.

404500121 is a deficient number, since it is larger than the sum of its proper divisors (13405543).

404500121 is a wasteful number, since it uses less digits than its factorization.

404500121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11191.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 404500121 is about 20112.1883692452. The cubic root of 404500121 is about 739.5591000327.

Adding to 404500121 its reverse (121005404), we get a palindrome (525505525).

The spelling of 404500121 in words is "four hundred four million, five hundred thousand, one hundred twenty-one".