420646567 has 8 divisors (see below), whose sum is σ = 483039360. Its totient is φ = 362279160.

The previous prime is 420646553. The next prime is 420646571. The reversal of 420646567 is 765646024.

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

It is a cyclic number.

It is not a de Polignac number, because 420646567 - 2¹¹ = 420644519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420646507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1006123 + ... + 1006540.

It is an arithmetic number, because the mean of its divisors is an integer number (60379920).

Almost surely, 2^420646567 is an apocalyptic number.

420646567 is a deficient number, since it is larger than the sum of its proper divisors (62392793).

420646567 is a wasteful number, since it uses less digits than its factorization.

420646567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012693.

The product of its (nonzero) digits is 241920, while the sum is 40.

The square root of 420646567 is about 20509.6700851086. The cubic root of 420646567 is about 749.2713319902.

The spelling of 420646567 in words is "four hundred twenty million, six hundred forty-six thousand, five hundred sixty-seven".