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130001 = 711831
BaseRepresentation
bin11111101111010001
320121022212
4133233101
513130001
62441505
71051004
oct375721
9217285
10130001
1189743
1263295
1347231
143553b
15287bb
hex1fbd1

130001 has 4 divisors (see below), whose sum is σ = 131904. Its totient is φ = 128100.

The previous prime is 129971. The next prime is 130003. The reversal of 130001 is 100031.

Adding to 130001 its reverse (100031), we get a palindrome (230032).

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100031 = 671493.

It is a cyclic number.

It is not a de Polignac number, because 130001 - 26 = 129937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (130003) 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, 845 + ... + 986.

It is an arithmetic number, because the mean of its divisors is an integer number (32976).

2130001 is an apocalyptic number.

It is an amenable number.

130001 is a deficient number, since it is larger than the sum of its proper divisors (1903).

130001 is an equidigital number, since it uses as much as digits as its factorization.

130001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902.

The product of its (nonzero) digits is 3, while the sum is 5.

The square root of 130001 is about 360.5565142942. The cubic root of 130001 is about 50.6581000829.

The spelling of 130001 in words is "one hundred thirty thousand, one".

Divisors: 1 71 1831 130001