420745506 has 8 divisors (see below), whose sum is σ = 841491024. Its totient is φ = 140248500.

The previous prime is 420745483. The next prime is 420745513. The reversal of 420745506 is 605547024.

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

420745506 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35062120 + ... + 35062131.

It is an arithmetic number, because the mean of its divisors is an integer number (105186378).

Almost surely, 2^420745506 is an apocalyptic number.

420745506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

420745506 is a wasteful number, since it uses less digits than its factorization.

420745506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70124256.

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 420745506 is about 20512.0819518644. The cubic root of 420745506 is about 749.3300719957.

The spelling of 420745506 in words is "four hundred twenty million, seven hundred forty-five thousand, five hundred six".