421240313 has 4 divisors (see below), whose sum is σ = 453643428. Its totient is φ = 388837200.

The previous prime is 421240289. The next prime is 421240327. The reversal of 421240313 is 313042124.

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 41886784 + 379353529 = 6472^2 + 19477^2 .

It is a cyclic number.

It is not a de Polignac number, because 421240313 - 2⁶ = 421240249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421240333) 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, 16201538 + ... + 16201563.

It is an arithmetic number, because the mean of its divisors is an integer number (113410857).

Almost surely, 2^421240313 is an apocalyptic number.

It is an amenable number.

421240313 is a deficient number, since it is larger than the sum of its proper divisors (32403115).

421240313 is a wasteful number, since it uses less digits than its factorization.

421240313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32403114.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 421240313 is about 20524.1397627282. The cubic root of 421240313 is about 749.6237004149.

Adding to 421240313 its reverse (313042124), we get a palindrome (734282437).

The spelling of 421240313 in words is "four hundred twenty-one million, two hundred forty thousand, three hundred thirteen".