303240401 has 4 divisors (see below), whose sum is σ = 308961972. Its totient is φ = 297518832.

The previous prime is 303240397. The next prime is 303240403. The reversal of 303240401 is 104042303.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104042303 = 1753 ⋅59351.

It can be written as a sum of positive squares in 2 ways, for example, as 143976001 + 159264400 = 11999^2 + 12620^2 .

It is a cyclic number.

It is not a de Polignac number, because 303240401 - 2² = 303240397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 303240401.

It is not an unprimeable number, because it can be changed into a prime (303240403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2860706 + ... + 2860811.

It is an arithmetic number, because the mean of its divisors is an integer number (77240493).

Almost surely, 2^303240401 is an apocalyptic number.

It is an amenable number.

303240401 is a deficient number, since it is larger than the sum of its proper divisors (5721571).

303240401 is an equidigital number, since it uses as much as digits as its factorization.

303240401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5721570.

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

The square root of 303240401 is about 17413.7991546934. The cubic root of 303240401 is about 671.8345806757.

Adding to 303240401 its reverse (104042303), we get a palindrome (407282704).

The spelling of 303240401 in words is "three hundred three million, two hundred forty thousand, four hundred one".