9959251 has 2 divisors, whose sum is σ = 9959252. Its totient is φ = 9959250.

The previous prime is 9959237. The next prime is 9959291. The reversal of 9959251 is 1529599.

It is an a-pointer prime, because the next prime (9959291) can be obtained adding 9959251 to its sum of digits (40).

It is a weak prime.

It is an emirp because it is prime and its reverse (1529599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9959251 - 2⁵ = 9959219 is a prime.

It is not a weakly prime, because it can be changed into another prime (9959231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4979625 + 4979626.

It is an arithmetic number, because the mean of its divisors is an integer number (4979626).

Almost surely, 2^9959251 is an apocalyptic number.

9959251 is a deficient number, since it is larger than the sum of its proper divisors (1).

9959251 is an equidigital number, since it uses as much as digits as its factorization.

9959251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36450, while the sum is 40.

The square root of 9959251 is about 3155.8281005150. The cubic root of 9959251 is about 215.1504337483.

The spelling of 9959251 in words is "nine million, nine hundred fifty-nine thousand, two hundred fifty-one".