303040421 has 4 divisors (see below), whose sum is σ = 303105600. Its totient is φ = 302975244.

The previous prime is 303040417. The next prime is 303040457. The reversal of 303040421 is 124040303.

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.

It is a cyclic number.

It is not a de Polignac number, because 303040421 - 2² = 303040417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 303040421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (303040411) 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, 25031 + ... + 35108.

It is an arithmetic number, because the mean of its divisors is an integer number (75776400).

Almost surely, 2^303040421 is an apocalyptic number.

It is an amenable number.

303040421 is a deficient number, since it is larger than the sum of its proper divisors (65179).

303040421 is an equidigital number, since it uses as much as digits as its factorization.

303040421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65178.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 303040421 is about 17408.0562096979. The cubic root of 303040421 is about 671.6868617656.

Adding to 303040421 its reverse (124040303), we get a palindrome (427080724).

The spelling of 303040421 in words is "three hundred three million, forty thousand, four hundred twenty-one".