420432243 has 32 divisors (see below), whose sum is σ = 700588032. Its totient is φ = 217879200.

The previous prime is 420432239. The next prime is 420432277. The reversal of 420432243 is 342234024.

It is not a de Polignac number, because 420432243 - 2² = 420432239 is a prime.

It is a super-2 number, since 2×420432243² = 353526541908022098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (420432223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104988 + ... + 108918.

It is an arithmetic number, because the mean of its divisors is an integer number (21893376).

Almost surely, 2^420432243 is an apocalyptic number.

420432243 is a deficient number, since it is larger than the sum of its proper divisors (280155789).

420432243 is a wasteful number, since it uses less digits than its factorization.

420432243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4415.

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 420432243 is about 20504.4444694315. Note that the first 4 decimals coincide. The cubic root of 420432243 is about 749.1440564079.

Adding to 420432243 its reverse (342234024), we get a palindrome (762666267).

The spelling of 420432243 in words is "four hundred twenty million, four hundred thirty-two thousand, two hundred forty-three".