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127087961 = 71113126961
BaseRepresentation
bin1111001001100…
…11010101011001
322212010201220112
413210303111121
5230013303321
620335534105
73102141560
oct744632531
9285121815
10127087961
1165813080
123668a335
13204391a0
1412c42bd7
15b255a5b
hex7933559

127087961 has 16 divisors (see below), whose sum is σ = 170636928. Its totient is φ = 91411200.

The previous prime is 127087943. The next prime is 127087981. The reversal of 127087961 is 169780721.

It is a cyclic number.

It is not a de Polignac number, because 127087961 - 26 = 127087897 is a prime.

It is a super-2 number, since 2×1270879612 = 32302699662275042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (127087981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62480 + ... + 64481.

It is an arithmetic number, because the mean of its divisors is an integer number (10664808).

Almost surely, 2127087961 is an apocalyptic number.

127087961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

127087961 is a deficient number, since it is larger than the sum of its proper divisors (43548967).

127087961 is a wasteful number, since it uses less digits than its factorization.

127087961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126992.

The product of its (nonzero) digits is 42336, while the sum is 41.

The square root of 127087961 is about 11273.3296323668. The cubic root of 127087961 is about 502.7685895287.

The spelling of 127087961 in words is "one hundred twenty-seven million, eighty-seven thousand, nine hundred sixty-one".

Divisors: 1 7 11 13 77 91 143 1001 126961 888727 1396571 1650493 9775997 11553451 18155423 127087961