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105047 = 731439
BaseRepresentation
bin11001101001010111
312100002122
4121221113
511330142
62130155
7615155
oct315127
9170078
10105047
1171a18
125095b
1338a77
142a3d5
15211d2
hex19a57

105047 has 4 divisors (see below), whose sum is σ = 106560. Its totient is φ = 103536.

The previous prime is 105037. The next prime is 105071. The reversal of 105047 is 740501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740501 = 4118061.

It is a cyclic number.

It is not a de Polignac number, because 105047 - 24 = 105031 is a prime.

It is a super-2 number, since 2×1050472 = 22069744418, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105037) 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, 647 + ... + 792.

It is an arithmetic number, because the mean of its divisors is an integer number (26640).

2105047 is an apocalyptic number.

105047 is a deficient number, since it is larger than the sum of its proper divisors (1513).

105047 is an equidigital number, since it uses as much as digits as its factorization.

105047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512.

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 105047 is about 324.1095493811. The cubic root of 105047 is about 47.1839778521.

Adding to 105047 its reverse (740501), we get a palindrome (845548).

The spelling of 105047 in words is "one hundred five thousand, forty-seven".

Divisors: 1 73 1439 105047