420431002 has 4 divisors (see below), whose sum is σ = 630646506. Its totient is φ = 210215500.

The previous prime is 420430979. The next prime is 420431051. The reversal of 420431002 is 200134024.

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., 326127481 + 94303521 = 18059^2 + 9711^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105107749 + ... + 105107752.

Almost surely, 2^420431002 is an apocalyptic number.

420431002 is a deficient number, since it is larger than the sum of its proper divisors (210215504).

420431002 is a wasteful number, since it uses less digits than its factorization.

420431002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210215503.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 420431002 is about 20504.4142076773. The cubic root of 420431002 is about 749.1433193183.

Adding to 420431002 its reverse (200134024), we get a palindrome (620565026).

The spelling of 420431002 in words is "four hundred twenty million, four hundred thirty-one thousand, two".