2121406504 has 32 divisors (see below), whose sum is σ = 4556185920. Its totient is φ = 907111296.

The previous prime is 2121406493. The next prime is 2121406549. The reversal of 2121406504 is 4056041212.

It is a happy number.

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, 17949 + ... + 67564.

It is an arithmetic number, because the mean of its divisors is an integer number (142380810).

Almost surely, 2^2121406504 is an apocalyptic number.

It is an amenable number.

2121406504 is an abundant number, since it is smaller than the sum of its proper divisors (2434779416).

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

2121406504 is a wasteful number, since it uses less digits than its factorization.

2121406504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85969 (or 85965 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 2121406504 is about 46058.7288578397. The cubic root of 2121406504 is about 1284.9156891799.

Adding to 2121406504 its reverse (4056041212), we get a palindrome (6177447716).

The spelling of 2121406504 in words is "two billion, one hundred twenty-one million, four hundred six thousand, five hundred four".