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130128955 = 5112365981
BaseRepresentation
bin1111100000110…
…01110000111011
3100001212020100221
413300121300323
5231303111310
620525040511
73140035465
oct760316073
9301766327
10130128955
11674aa8a0
12376b6137
1320c623a8
14133d5135
15b656ada
hex7c19c3b

130128955 has 8 divisors (see below), whose sum is σ = 170350704. Its totient is φ = 94639200.

The previous prime is 130128953. The next prime is 130128961. The reversal of 130128955 is 559821031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 130128955 - 21 = 130128953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 130128955.

It is not an unprimeable number, because it can be changed into a prime (130128953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1182936 + ... + 1183045.

It is an arithmetic number, because the mean of its divisors is an integer number (21293838).

Almost surely, 2130128955 is an apocalyptic number.

130128955 is a deficient number, since it is larger than the sum of its proper divisors (40221749).

130128955 is a wasteful number, since it uses less digits than its factorization.

130128955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365997.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 130128955 is about 11407.4079001323. The cubic root of 130128955 is about 506.7471490821.

Adding to 130128955 its reverse (559821031), we get a palindrome (689949986).

The spelling of 130128955 in words is "one hundred thirty million, one hundred twenty-eight thousand, nine hundred fifty-five".

Divisors: 1 5 11 55 2365981 11829905 26025791 130128955