420506641 has 8 divisors (see below), whose sum is σ = 435254400. Its totient is φ = 405775440.

The previous prime is 420506633. The next prime is 420506657. The reversal of 420506641 is 146605024.

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 420506641 - 2³ = 420506633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420504641) 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, 70776 + ... + 76486.

It is an arithmetic number, because the mean of its divisors is an integer number (54406800).

Almost surely, 2^420506641 is an apocalyptic number.

It is an amenable number.

420506641 is a deficient number, since it is larger than the sum of its proper divisors (14747759).

420506641 is a wasteful number, since it uses less digits than its factorization.

420506641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8279.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 420506641 is about 20506.2585812234. The cubic root of 420506641 is about 749.1882423088.

The spelling of 420506641 in words is "four hundred twenty million, five hundred six thousand, six hundred forty-one".