420736005 has 16 divisors (see below), whose sum is σ = 747975360. Its totient is φ = 224392464.

The previous prime is 420735977. The next prime is 420736013. The reversal of 420736005 is 500637024.

It is a happy number.

It is not a de Polignac number, because 420736005 - 2¹⁹ = 420211717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 420736005.

It is a congruent number.

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 in 15 ways as a sum of consecutive naturals, for example, 1558147 + ... + 1558416.

It is an arithmetic number, because the mean of its divisors is an integer number (46748460).

Almost surely, 2^420736005 is an apocalyptic number.

420736005 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

420736005 is a deficient number, since it is larger than the sum of its proper divisors (327239355).

420736005 is a wasteful number, since it uses less digits than its factorization.

420736005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3116577 (or 3116571 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 420736005 is about 20511.8503553434. The cubic root of 420736005 is about 749.3244316593.

The spelling of 420736005 in words is "four hundred twenty million, seven hundred thirty-six thousand, five".