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102487 = 7114
BaseRepresentation
bin11001000001010111
312012120211
4121001113
511234422
62110251
7604540
oct310127
9165524
10102487
1170000
124b387
1337858
14294c7
1520577
hex19057

102487 has 10 divisors (see below), whose sum is σ = 128840. Its totient is φ = 79860.

The previous prime is 102481. The next prime is 102497. The reversal of 102487 is 784201.

Multipling 102487 by its product of nonzero digits (448), we get a square (45914176 = 67762).

Adding to 102487 its reverse (784201), we get a palindrome (886688).

It can be divided in two parts, 1024 and 87, that added together give a palindrome (1111).

It is not a de Polignac number, because 102487 - 27 = 102359 is a prime.

It is a Duffinian number.

102487 is a lucky number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102481) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 9312 + ... + 9322.

It is an arithmetic number, because the mean of its divisors is an integer number (12884).

102487 is a Friedman number, since it can be written as 7*(8+2+1+0)^4, using all its digits and the basic arithmetic operations.

2102487 is an apocalyptic number.

102487 is a deficient number, since it is larger than the sum of its proper divisors (26353).

102487 is an frugal number, since it uses more digits than its factorization.

102487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 102487 is about 320.1359086388. The cubic root of 102487 is about 46.7975295163.

The spelling of 102487 in words is "one hundred two thousand, four hundred eighty-seven".

Divisors: 1 7 11 77 121 847 1331 9317 14641 102487