2421542345 has 4 divisors (see below), whose sum is σ = 2905850820. Its totient is φ = 1937233872.

The previous prime is 2421542317. The next prime is 2421542351. The reversal of 2421542345 is 5432451242.

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 1390618681 + 1030923664 = 37291^2 + 32108^2 .

It is a cyclic number.

It is not a de Polignac number, because 2421542345 - 2⁸ = 2421542089 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242154230 + ... + 242154239.

It is an arithmetic number, because the mean of its divisors is an integer number (726462705).

Almost surely, 2^2421542345 is an apocalyptic number.

It is an amenable number.

2421542345 is a deficient number, since it is larger than the sum of its proper divisors (484308475).

2421542345 is an equidigital number, since it uses as much as digits as its factorization.

2421542345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484308474.

The product of its digits is 38400, while the sum is 32.

The square root of 2421542345 is about 49209.1693183293. The cubic root of 2421542345 is about 1342.8598505706.

Adding to 2421542345 its reverse (5432451242), we get a palindrome (7853993587).

The spelling of 2421542345 in words is "two billion, four hundred twenty-one million, five hundred forty-two thousand, three hundred forty-five".