401221004 has 24 divisors (see below), whose sum is σ = 722675520. Its totient is φ = 194824784.

The previous prime is 401220997. The next prime is 401221027. The reversal of 401221004 is 400122104.

It is a self number, because there is not a number n which added to its sum of digits gives 401221004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9347 + ... + 29829.

It is an arithmetic number, because the mean of its divisors is an integer number (30111480).

Almost surely, 2^401221004 is an apocalyptic number.

It is an amenable number.

401221004 is a deficient number, since it is larger than the sum of its proper divisors (321454516).

401221004 is a wasteful number, since it uses less digits than its factorization.

401221004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20629 (or 20627 counting only the distinct ones).

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

The square root of 401221004 is about 20030.5018409425. The cubic root of 401221004 is about 737.5552410599. Note that the first 3 decimals are identical.

Adding to 401221004 its reverse (400122104), we get a palindrome (801343108).

It can be divided in two parts, 40122100 and 4, that added together give a palindrome (40122104).

The spelling of 401221004 in words is "four hundred one million, two hundred twenty-one thousand, four".