9957251 has 2 divisors, whose sum is σ = 9957252. Its totient is φ = 9957250.

The previous prime is 9957247. The next prime is 9957271. The reversal of 9957251 is 1527599.

It is a weak prime.

It is an emirp because it is prime and its reverse (1527599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9957251 - 2² = 9957247 is a prime.

It is not a weakly prime, because it can be changed into another prime (9957271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4978625 + 4978626.

It is an arithmetic number, because the mean of its divisors is an integer number (4978626).

Almost surely, 2^9957251 is an apocalyptic number.

9957251 is a deficient number, since it is larger than the sum of its proper divisors (1).

9957251 is an equidigital number, since it uses as much as digits as its factorization.

9957251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28350, while the sum is 38.

The square root of 9957251 is about 3155.5112105648. The cubic root of 9957251 is about 215.1360307350.

The spelling of 9957251 in words is "nine million, nine hundred fifty-seven thousand, two hundred fifty-one".