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10120261 is a prime number
BaseRepresentation
bin100110100110…
…110001000101
3201001011101111
4212212301011
510042322021
61000525021
7152010064
oct46466105
921034344
1010120261
115792558
123480771
132134528
1414b61db
15d4d8e1
hex9a6c45

10120261 has 2 divisors, whose sum is σ = 10120262. Its totient is φ = 10120260.

The previous prime is 10120259. The next prime is 10120289. The reversal of 10120261 is 16202101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5731236 + 4389025 = 2394^2 + 2095^2 .

It is an emirp because it is prime and its reverse (16202101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10120261 - 21 = 10120259 is a prime.

Together with 10120259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10120241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060130 + 5060131.

It is an arithmetic number, because the mean of its divisors is an integer number (5060131).

Almost surely, 210120261 is an apocalyptic number.

It is an amenable number.

10120261 is a deficient number, since it is larger than the sum of its proper divisors (1).

10120261 is an equidigital number, since it uses as much as digits as its factorization.

10120261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 10120261 is about 3181.2357661764. The cubic root of 10120261 is about 216.3036780778.

Adding to 10120261 its reverse (16202101), we get a palindrome (26322362).

The spelling of 10120261 in words is "ten million, one hundred twenty thousand, two hundred sixty-one".