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428101 = 795419
BaseRepresentation
bin1101000100001000101
3210202020121
41220201011
5102144401
613101541
73432052
oct1504105
9722217
10428101
11272703
121878b1
1311cb1b
14b2029
1586ca1
hex68845

428101 has 4 divisors (see below), whose sum is σ = 433600. Its totient is φ = 422604.

The previous prime is 428093. The next prime is 428137. The reversal of 428101 is 101824.

It is a happy number.

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 428101 - 23 = 428093 is a prime.

It is a Duffinian number.

428101 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2631 + ... + 2788.

It is an arithmetic number, because the mean of its divisors is an integer number (108400).

2428101 is an apocalyptic number.

It is an amenable number.

428101 is a deficient number, since it is larger than the sum of its proper divisors (5499).

428101 is an equidigital number, since it uses as much as digits as its factorization.

428101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5498.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 428101 is about 654.2942763008. The cubic root of 428101 is about 75.3671479142.

Adding to 428101 its reverse (101824), we get a palindrome (529925).

It can be divided in two parts, 428 and 101, that added together give a square (529 = 232).

The spelling of 428101 in words is "four hundred twenty-eight thousand, one hundred one".

Divisors: 1 79 5419 428101