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130405 = 5112371
BaseRepresentation
bin11111110101100101
320121212211
4133311211
513133110
62443421
71052122
oct376545
9217784
10130405
1189a80
1263571
1347482
1435749
152898a
hex1fd65

130405 has 8 divisors (see below), whose sum is σ = 170784. Its totient is φ = 94800.

The previous prime is 130399. The next prime is 130409. The reversal of 130405 is 504031.

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

It is not a de Polignac number, because 130405 - 29 = 129893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130409) 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, 1131 + ... + 1240.

It is an arithmetic number, because the mean of its divisors is an integer number (21348).

2130405 is an apocalyptic number.

It is an amenable number.

130405 is a deficient number, since it is larger than the sum of its proper divisors (40379).

130405 is a wasteful number, since it uses less digits than its factorization.

130405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2387.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 130405 is about 361.1163247487. The cubic root of 130405 is about 50.7105220093.

Adding to 130405 its reverse (504031), we get a palindrome (634436).

It can be divided in two parts, 130 and 405, that multiplied together give a triangular number (52650 = T324).

The spelling of 130405 in words is "one hundred thirty thousand, four hundred five".

Divisors: 1 5 11 55 2371 11855 26081 130405