303242421 has 4 divisors (see below), whose sum is σ = 404323232. Its totient is φ = 202161612.

The previous prime is 303242411. The next prime is 303242461. The reversal of 303242421 is 124242303.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124242303 = 3 ⋅41414101.

It is not a de Polignac number, because 303242421 - 2⁷ = 303242293 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 (303242411) by changing a digit.

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, 50540401 + ... + 50540406.

It is an arithmetic number, because the mean of its divisors is an integer number (101080808).

Almost surely, 2^303242421 is an apocalyptic number.

It is an amenable number.

303242421 is a deficient number, since it is larger than the sum of its proper divisors (101080811).

303242421 is a wasteful number, since it uses less digits than its factorization.

303242421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101080810.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 303242421 is about 17413.8571545766. The cubic root of 303242421 is about 671.8360724546.

Adding to 303242421 its reverse (124242303), we get a palindrome (427484724).

The spelling of 303242421 in words is "three hundred three million, two hundred forty-two thousand, four hundred twenty-one".