420243011 has 4 divisors (see below), whose sum is σ = 420864432. Its totient is φ = 419621592.

The previous prime is 420242993. The next prime is 420243049. The reversal of 420243011 is 110342024.

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 420243011 - 2¹⁴ = 420226627 is a prime.

It is a super-2 number, since 2×420243011² = 353208376588692242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420243911) 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, 309695 + ... + 311048.

It is an arithmetic number, because the mean of its divisors is an integer number (105216108).

Almost surely, 2^420243011 is an apocalyptic number.

420243011 is a deficient number, since it is larger than the sum of its proper divisors (621421).

420243011 is an equidigital number, since it uses as much as digits as its factorization.

420243011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621420.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 420243011 is about 20499.8295358766. The cubic root of 420243011 is about 749.0316456653.

Adding to 420243011 its reverse (110342024), we get a palindrome (530585035).

The spelling of 420243011 in words is "four hundred twenty million, two hundred forty-three thousand, eleven".