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25279217 is a prime number
BaseRepresentation
bin110000001101…
…1101011110001
31202120022120022
41200123223301
522432413332
62301453225
7424604225
oct140335361
952508508
1025279217
11132a6717
128571215
135311322
143500785
152345212
hex181baf1

25279217 has 2 divisors, whose sum is σ = 25279218. Its totient is φ = 25279216.

The previous prime is 25279211. The next prime is 25279249. The reversal of 25279217 is 71297252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18524416 + 6754801 = 4304^2 + 2599^2 .

It is a cyclic number.

It is not a de Polignac number, because 25279217 - 212 = 25275121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25279211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12639608 + 12639609.

It is an arithmetic number, because the mean of its divisors is an integer number (12639609).

Almost surely, 225279217 is an apocalyptic number.

It is an amenable number.

25279217 is a deficient number, since it is larger than the sum of its proper divisors (1).

25279217 is an equidigital number, since it uses as much as digits as its factorization.

25279217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 35.

The square root of 25279217 is about 5027.8441702185. The cubic root of 25279217 is about 293.4863267266.

The spelling of 25279217 in words is "twenty-five million, two hundred seventy-nine thousand, two hundred seventeen".