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127135423 = 472705009
BaseRepresentation
bin1111001001111…
…10111010111111
322212020011000101
413210332322333
5230021313143
620340541531
73102430132
oct744767277
9285204011
10127135423
11658457a8
12366b18a7
132045497c
1412c56219
15b264b4d
hex793eebf

127135423 has 4 divisors (see below), whose sum is σ = 129840480. Its totient is φ = 124430368.

The previous prime is 127135399. The next prime is 127135427. The reversal of 127135423 is 324531721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324531721 = 2911190749.

It is a cyclic number.

It is not a de Polignac number, because 127135423 - 217 = 127004351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 127135391 and 127135400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127135427) 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, 1352458 + ... + 1352551.

It is an arithmetic number, because the mean of its divisors is an integer number (32460120).

Almost surely, 2127135423 is an apocalyptic number.

127135423 is a deficient number, since it is larger than the sum of its proper divisors (2705057).

127135423 is an equidigital number, since it uses as much as digits as its factorization.

127135423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2705056.

The product of its digits is 5040, while the sum is 28.

The square root of 127135423 is about 11275.4344927369. The cubic root of 127135423 is about 502.8311693689.

The spelling of 127135423 in words is "one hundred twenty-seven million, one hundred thirty-five thousand, four hundred twenty-three".

Divisors: 1 47 2705009 127135423