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129941 = 719977
BaseRepresentation
bin11111101110010101
320121020122
4133232111
513124231
62441325
71050560
oct375625
9217218
10129941
1189699
1263245
13471b6
14354d7
152877b
hex1fb95

129941 has 8 divisors (see below), whose sum is σ = 156480. Its totient is φ = 105408.

The previous prime is 129937. The next prime is 129953. The reversal of 129941 is 149921.

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

It is a cyclic number.

It is not a de Polignac number, because 129941 - 22 = 129937 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 129941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129901) 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, 356 + ... + 621.

It is an arithmetic number, because the mean of its divisors is an integer number (19560).

2129941 is an apocalyptic number.

It is an amenable number.

129941 is a deficient number, since it is larger than the sum of its proper divisors (26539).

129941 is an equidigital number, since it uses as much as digits as its factorization.

129941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003.

The product of its digits is 648, while the sum is 26.

The square root of 129941 is about 360.4732999821. The cubic root of 129941 is about 50.6503053897.

The spelling of 129941 in words is "one hundred twenty-nine thousand, nine hundred forty-one".

Divisors: 1 7 19 133 977 6839 18563 129941