420413243 has 4 divisors (see below), whose sum is σ = 420482040. Its totient is φ = 420344448.

The previous prime is 420413239. The next prime is 420413249. The reversal of 420413243 is 342314024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420413243 - 2² = 420413239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420413249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24230 + ... + 37787.

It is an arithmetic number, because the mean of its divisors is an integer number (105120510).

Almost surely, 2^420413243 is an apocalyptic number.

420413243 is a deficient number, since it is larger than the sum of its proper divisors (68797).

420413243 is an equidigital number, since it uses as much as digits as its factorization.

420413243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68796.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 420413243 is about 20503.9811500108. The cubic root of 420413243 is about 749.1327712352.

Adding to 420413243 its reverse (342314024), we get a palindrome (762727267).

The spelling of 420413243 in words is "four hundred twenty million, four hundred thirteen thousand, two hundred forty-three".