2421542405 has 4 divisors (see below), whose sum is σ = 2905850892. Its totient is φ = 1937233920.

The previous prime is 2421542399. The next prime is 2421542411. The reversal of 2421542405 is 5042451242.

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

It is an interprime number because it is at equal distance from previous prime (2421542399) and next prime (2421542411).

It can be written as a sum of positive squares in 2 ways, for example, as 1847796196 + 573746209 = 42986^2 + 23953^2 .

It is not a de Polignac number, because 2421542405 - 2¹⁴ = 2421526021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242154236 + ... + 242154245.

It is an arithmetic number, because the mean of its divisors is an integer number (726462723).

Almost surely, 2^2421542405 is an apocalyptic number.

It is an amenable number.

2421542405 is a deficient number, since it is larger than the sum of its proper divisors (484308487).

2421542405 is an equidigital number, since it uses as much as digits as its factorization.

2421542405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484308486.

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 2421542405 is about 49209.1699279718. The cubic root of 2421542405 is about 1342.8598616616.

Adding to 2421542405 its reverse (5042451242), we get a palindrome (7463993647).

The spelling of 2421542405 in words is "two billion, four hundred twenty-one million, five hundred forty-two thousand, four hundred five".