420431234 has 4 divisors (see below), whose sum is σ = 630646854. Its totient is φ = 210215616.

The previous prime is 420431201. The next prime is 420431239. The reversal of 420431234 is 432134024.

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

It can be written as a sum of positive squares in only one way, i.e., 252651025 + 167780209 = 15895^2 + 12953^2 .

It is not an unprimeable number, because it can be changed into a prime (420431239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105107807 + ... + 105107810.

Almost surely, 2^420431234 is an apocalyptic number.

420431234 is a deficient number, since it is larger than the sum of its proper divisors (210215620).

420431234 is a wasteful number, since it uses less digits than its factorization.

420431234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210215619.

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

The square root of 420431234 is about 20504.4198649950. The cubic root of 420431234 is about 749.1434571144.

Adding to 420431234 its reverse (432134024), we get a palindrome (852565258).

The spelling of 420431234 in words is "four hundred twenty million, four hundred thirty-one thousand, two hundred thirty-four".