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130975 = 5213231
BaseRepresentation
bin11111111110011111
320122122221
4133332133
513142400
62450211
71053565
oct377637
9218587
10130975
118a449
1263967
1347800
1435a35
1528c1a
hex1ff9f

130975 has 18 divisors (see below), whose sum is σ = 181536. Its totient is φ = 93600.

The previous prime is 130973. The next prime is 130981. The reversal of 130975 is 579031.

It is not a de Polignac number, because 130975 - 21 = 130973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130973) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4210 + ... + 4240.

2130975 is an apocalyptic number.

130975 is a deficient number, since it is larger than the sum of its proper divisors (50561).

130975 is a wasteful number, since it uses less digits than its factorization.

130975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 945, while the sum is 25.

The square root of 130975 is about 361.9046835840. The cubic root of 130975 is about 50.7842998168.

It can be divided in two parts, 1 and 30975, that added together give a square (30976 = 1762).

The spelling of 130975 in words is "one hundred thirty thousand, nine hundred seventy-five".

Divisors: 1 5 13 25 31 65 155 169 325 403 775 845 2015 4225 5239 10075 26195 130975