420577 has 4 divisors (see below), whose sum is σ = 434176. Its totient is φ = 406980.

The previous prime is 420571. The next prime is 420593. The reversal of 420577 is 775024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 420577 - 2³ = 420569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6753 + ... + 6814.

It is an arithmetic number, because the mean of its divisors is an integer number (108544).

2⁴²⁰⁵⁷⁷ is an apocalyptic number.

It is an amenable number.

420577 is a deficient number, since it is larger than the sum of its proper divisors (13599).

420577 is a wasteful number, since it uses less digits than its factorization.

420577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13598.

The product of its (nonzero) digits is 1960, while the sum is 25.

The square root of 420577 is about 648.5190822173. The cubic root of 420577 is about 74.9230024603.

The spelling of 420577 in words is "four hundred twenty thousand, five hundred seventy-seven".