5205261421 has 16 divisors (see below), whose sum is σ = 5381821440. Its totient is φ = 5031739440.

The previous prime is 5205261403. The next prime is 5205261449. The reversal of 5205261421 is 1241625025.

5205261421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 5205261421 - 2²⁷ = 5071043693 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5205261421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5205265421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1904626 + ... + 1907356.

It is an arithmetic number, because the mean of its divisors is an integer number (336363840).

Almost surely, 2^5205261421 is an apocalyptic number.

It is an amenable number.

5205261421 is a deficient number, since it is larger than the sum of its proper divisors (176560019).

5205261421 is a wasteful number, since it uses less digits than its factorization.

5205261421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3264.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 5205261421 is about 72147.4976766346. The cubic root of 5205261421 is about 1733.0623276462.

Adding to 5205261421 its reverse (1241625025), we get a palindrome (6446886446).

The spelling of 5205261421 in words is "five billion, two hundred five million, two hundred sixty-one thousand, four hundred twenty-one".