Search a number
-
+
13123141 = 14818861
BaseRepresentation
bin110010000011…
…111001000101
3220200201120021
4302003321011
511324420031
61145135141
7216354613
oct62037105
926621507
1013123141
117453679
12448a4b1
132946295
141a586b3
151243511
hexc83e45

13123141 has 4 divisors (see below), whose sum is σ = 13133484. Its totient is φ = 13112800.

The previous prime is 13123111. The next prime is 13123147. The reversal of 13123141 is 14132131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10304100 + 2819041 = 3210^2 + 1679^2 .

It is a cyclic number.

It is not a de Polignac number, because 13123141 - 213 = 13114949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123147) 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 3 ways as a sum of consecutive naturals, for example, 2950 + ... + 5911.

It is an arithmetic number, because the mean of its divisors is an integer number (3283371).

Almost surely, 213123141 is an apocalyptic number.

It is an amenable number.

13123141 is a deficient number, since it is larger than the sum of its proper divisors (10343).

13123141 is an equidigital number, since it uses as much as digits as its factorization.

13123141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10342.

The product of its digits is 72, while the sum is 16.

The square root of 13123141 is about 3622.5876110869. The cubic root of 13123141 is about 235.8735617368.

Adding to 13123141 its reverse (14132131), we get a palindrome (27255272).

The spelling of 13123141 in words is "thirteen million, one hundred twenty-three thousand, one hundred forty-one".

Divisors: 1 1481 8861 13123141