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102149 is a prime number
BaseRepresentation
bin11000111100000101
312012010022
4120330011
511232044
62104525
7603545
oct307405
9165108
10102149
116a823
124b145
1337658
1429325
15203ee
hex18f05

102149 has 2 divisors, whose sum is σ = 102150. Its totient is φ = 102148.

The previous prime is 102139. The next prime is 102161. The reversal of 102149 is 941201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66049 + 36100 = 257^2 + 190^2 .

It is an emirp because it is prime and its reverse (941201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-102149 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51074 + 51075.

It is an arithmetic number, because the mean of its divisors is an integer number (51075).

2102149 is an apocalyptic number.

It is an amenable number.

102149 is a deficient number, since it is larger than the sum of its proper divisors (1).

102149 is an equidigital number, since it uses as much as digits as its factorization.

102149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 102149 is about 319.6075718753. The cubic root of 102149 is about 46.7460270962.

The spelling of 102149 in words is "one hundred two thousand, one hundred forty-nine".