5405442421 has 4 divisors (see below), whose sum is σ = 5405899500. Its totient is φ = 5404985344.

The previous prime is 5405442407. The next prime is 5405442431. The reversal of 5405442421 is 1242445045.

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 5297801796 + 107640625 = 72786^2 + 10375^2 .

It is a cyclic number.

It is not a de Polignac number, because 5405442421 - 2⁷ = 5405442293 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 (5405442401) 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, 210316 + ... + 234613.

It is an arithmetic number, because the mean of its divisors is an integer number (1351474875).

Almost surely, 2^5405442421 is an apocalyptic number.

It is an amenable number.

5405442421 is a deficient number, since it is larger than the sum of its proper divisors (457079).

5405442421 is a wasteful number, since it uses less digits than its factorization.

5405442421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457078.

The product of its (nonzero) digits is 25600, while the sum is 31.

The square root of 5405442421 is about 73521.7139422089. The cubic root of 5405442421 is about 1754.9998426420. Note that the first 3 decimals are identical.

Adding to 5405442421 its reverse (1242445045), we get a palindrome (6647887466).

The spelling of 5405442421 in words is "five billion, four hundred five million, four hundred forty-two thousand, four hundred twenty-one".