420443547 has 8 divisors (see below), whose sum is σ = 564683856. Its totient is φ = 278249472.

The previous prime is 420443489. The next prime is 420443549. The reversal of 420443547 is 745344024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420443547 - 2¹² = 420439451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420443549) 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 7 ways as a sum of consecutive naturals, for example, 511078 + ... + 511899.

It is an arithmetic number, because the mean of its divisors is an integer number (70585482).

Almost surely, 2^420443547 is an apocalyptic number.

420443547 is a deficient number, since it is larger than the sum of its proper divisors (144240309).

420443547 is a wasteful number, since it uses less digits than its factorization.

420443547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023117.

The product of its (nonzero) digits is 53760, while the sum is 33.

The square root of 420443547 is about 20504.7201151345. The cubic root of 420443547 is about 749.1507703305.

The spelling of 420443547 in words is "four hundred twenty million, four hundred forty-three thousand, five hundred forty-seven".