Base | Representation |
---|---|
bin | 1111101010111… |
… | …10000001100011 |
3 | 100011100201021100 |
4 | 13311132001203 |
5 | 232123111443 |
6 | 21013325443 |
7 | 3154236630 |
oct | 765360143 |
9 | 304321240 |
10 | 131457123 |
11 | 68227756 |
12 | 38036883 |
13 | 21308aa5 |
14 | 1365d187 |
15 | b81a3d3 |
hex | 7d5e063 |
131457123 has 12 divisors (see below), whose sum is σ = 217008688. Its totient is φ = 75118320.
The previous prime is 131457113. The next prime is 131457163. The reversal of 131457123 is 321754131.
It is not a de Polignac number, because 131457123 - 213 = 131448931 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (131457103) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1043248 + ... + 1043373.
Almost surely, 2131457123 is an apocalyptic number.
131457123 is a deficient number, since it is larger than the sum of its proper divisors (85551565).
131457123 is a wasteful number, since it uses less digits than its factorization.
131457123 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2086634 (or 2086631 counting only the distinct ones).
The product of its digits is 2520, while the sum is 27.
The square root of 131457123 is about 11465.4752627181. The cubic root of 131457123 is about 508.4653637039.
The spelling of 131457123 in words is "one hundred thirty-one million, four hundred fifty-seven thousand, one hundred twenty-three".
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