404121020 has 24 divisors (see below), whose sum is σ = 849248064. Its totient is φ = 161535296.

The previous prime is 404121007. The next prime is 404121023. The reversal of 404121020 is 20121404.

It is a junction number, because it is equal to n+sod(n) for n = 404120986 and 404121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404121023) 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, 25997 + ... + 38523.

It is an arithmetic number, because the mean of its divisors is an integer number (35385336).

Almost surely, 2^404121020 is an apocalyptic number.

It is an amenable number.

404121020 is an abundant number, since it is smaller than the sum of its proper divisors (445127044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404121020 is a wasteful number, since it uses less digits than its factorization.

404121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14149 (or 14147 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 404121020 is about 20102.7615018435. The cubic root of 404121020 is about 739.3279874297.

Adding to 404121020 its reverse (20121404), we get a palindrome (424242424).

The spelling of 404121020 in words is "four hundred four million, one hundred twenty-one thousand, twenty".