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102415 = 520483
BaseRepresentation
bin11001000000001111
312012111011
4121000033
511234130
62110051
7604405
oct310017
9165434
10102415
116aa45
124b327
1337801
1429475
152052a
hex1900f

102415 has 4 divisors (see below), whose sum is σ = 122904. Its totient is φ = 81928.

The previous prime is 102409. The next prime is 102433. The reversal of 102415 is 514201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102415 - 23 = 102407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102395 and 102404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10237 + ... + 10246.

It is an arithmetic number, because the mean of its divisors is an integer number (30726).

2102415 is an apocalyptic number.

102415 is a deficient number, since it is larger than the sum of its proper divisors (20489).

102415 is an equidigital number, since it uses as much as digits as its factorization.

102415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20488.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 102415 is about 320.0234366418. The cubic root of 102415 is about 46.7865680887.

Adding to 102415 its reverse (514201), we get a palindrome (616616).

The spelling of 102415 in words is "one hundred two thousand, four hundred fifteen".

Divisors: 1 5 20483 102415