420243012 has 72 divisors (see below), whose sum is σ = 1267415520. Its totient is φ = 120067920.

The previous prime is 420242993. The next prime is 420243049. The reversal of 420243012 is 210342024.

420243012 is a `hidden beast` number, since 420 + 243 + 0 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34414 + ... + 44997.

Almost surely, 2^420243012 is an apocalyptic number.

420243012 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

420243012 is an abundant number, since it is smaller than the sum of its proper divisors (847172508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420243012 is a wasteful number, since it uses less digits than its factorization.

420243012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79438 (or 79423 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 420243012 is about 20499.8295602671. The cubic root of 420243012 is about 749.0316462595.

Adding to 420243012 its reverse (210342024), we get a palindrome (630585036).

The spelling of 420243012 in words is "four hundred twenty million, two hundred forty-three thousand, twelve".