420503547 has 4 divisors (see below), whose sum is σ = 560671400. Its totient is φ = 280335696.

The previous prime is 420503539. The next prime is 420503609. The reversal of 420503547 is 745305024.

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

It is not a de Polignac number, because 420503547 - 2³ = 420503539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420503507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70083922 + ... + 70083927.

It is an arithmetic number, because the mean of its divisors is an integer number (140167850).

Almost surely, 2^420503547 is an apocalyptic number.

420503547 is a deficient number, since it is larger than the sum of its proper divisors (140167853).

420503547 is a wasteful number, since it uses less digits than its factorization.

420503547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140167852.

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 420503547 is about 20506.1831407017. The cubic root of 420503547 is about 749.1864048475.

The spelling of 420503547 in words is "four hundred twenty million, five hundred three thousand, five hundred forty-seven".