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100442 = 250221
BaseRepresentation
bin11000100001011010
312002210002
4120201122
511203232
62053002
7565556
oct304132
9162702
10100442
1169511
124a162
1336944
1428866
151eb62
hex1885a

100442 has 4 divisors (see below), whose sum is σ = 150666. Its totient is φ = 50220.

The previous prime is 100417. The next prime is 100447. The reversal of 100442 is 244001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 96721 + 3721 = 311^2 + 61^2 .

It is not an unprimeable number, because it can be changed into a prime (100447) 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 as a sum of consecutive naturals, namely, 25109 + ... + 25112.

2100442 is an apocalyptic number.

100442 is a deficient number, since it is larger than the sum of its proper divisors (50224).

100442 is an equidigital number, since it uses as much as digits as its factorization.

100442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50223.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 100442 is about 316.9258588377. The cubic root of 100442 is about 46.4841739028.

Adding to 100442 its reverse (244001), we get a palindrome (344443).

The spelling of 100442 in words is "one hundred thousand, four hundred forty-two", and thus it is an iban number.

Divisors: 1 2 50221 100442