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102620161 = 726313319
BaseRepresentation
bin1100001110111…
…01110000000001
321011002122101201
412013131300001
5202232321121
614103301201
72354154100
oct607356001
9234078351
10102620161
1152a21056
122a44a801
13183502b7
14d8b4037
159020e91
hex61ddc01

102620161 has 12 divisors (see below), whose sum is σ = 119599680. Its totient is φ = 87794280.

The previous prime is 102620123. The next prime is 102620209. The reversal of 102620161 is 161026201.

Adding to 102620161 its reverse (161026201), we get a palindrome (263646362).

It is not a de Polignac number, because 102620161 - 221 = 100523009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102620101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29260 + ... + 32578.

It is an arithmetic number, because the mean of its divisors is an integer number (9966640).

Almost surely, 2102620161 is an apocalyptic number.

It is an amenable number.

102620161 is a deficient number, since it is larger than the sum of its proper divisors (16979519).

102620161 is an equidigital number, since it uses as much as digits as its factorization.

102620161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3964 (or 3957 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 102620161 is about 10130.1609562731. The cubic root of 102620161 is about 468.1778869994.

The spelling of 102620161 in words is "one hundred two million, six hundred twenty thousand, one hundred sixty-one".

Divisors: 1 7 49 631 3319 4417 23233 30919 162631 2094289 14660023 102620161