5605426021 has 4 divisors (see below), whose sum is σ = 6036612652. Its totient is φ = 5174239392.

The previous prime is 5605426019. The next prime is 5605426027. The reversal of 5605426021 is 1206245065.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2403450625 + 3201975396 = 49025^2 + 56586^2 .

It is a cyclic number.

It is not a de Polignac number, because 5605426021 - 2¹ = 5605426019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5605426027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215593296 + ... + 215593321.

It is an arithmetic number, because the mean of its divisors is an integer number (1509153163).

Almost surely, 2^5605426021 is an apocalyptic number.

It is an amenable number.

5605426021 is a deficient number, since it is larger than the sum of its proper divisors (431186631).

5605426021 is a wasteful number, since it uses less digits than its factorization.

5605426021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431186630.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 5605426021 is about 74869.3930855593. The cubic root of 5605426021 is about 1776.3813642662.

The spelling of 5605426021 in words is "five billion, six hundred five million, four hundred twenty-six thousand, twenty-one".