420755 has 16 divisors (see below), whose sum is σ = 549120. Its totient is φ = 308448.

The previous prime is 420743. The next prime is 420757. The reversal of 420755 is 557024.

It is a cyclic number.

It is not a de Polignac number, because 420755 - 2⁶ = 420691 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420755.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4034 + ... + 4136.

It is an arithmetic number, because the mean of its divisors is an integer number (34320).

2⁴²⁰⁷⁵⁵ is an apocalyptic number.

420755 is a deficient number, since it is larger than the sum of its proper divisors (128365).

420755 is a wasteful number, since it uses less digits than its factorization.

420755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 420755 is about 648.6563034458. The cubic root of 420755 is about 74.9335708092.

Adding to 420755 its reverse (557024), we get a palindrome (977779).

The spelling of 420755 in words is "four hundred twenty thousand, seven hundred fifty-five".