117801251 has 2 divisors, whose sum is σ = 117801252. Its totient is φ = 117801250.

The previous prime is 117801227. The next prime is 117801253. The reversal of 117801251 is 152108711.

It is a strong prime.

It is an emirp because it is prime and its reverse (152108711) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117801251 is a prime.

Together with 117801253, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117801251.

It is not a weakly prime, because it can be changed into another prime (117801253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58900625 + 58900626.

It is an arithmetic number, because the mean of its divisors is an integer number (58900626).

Almost surely, 2^117801251 is an apocalyptic number.

117801251 is a deficient number, since it is larger than the sum of its proper divisors (1).

117801251 is an equidigital number, since it uses as much as digits as its factorization.

117801251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 26.

The square root of 117801251 is about 10853.6284716218. The cubic root of 117801251 is about 490.2112805367.

Adding to 117801251 its reverse (152108711), we get a palindrome (269909962).

It can be divided in two parts, 11780 and 1251, that added together give a palindrome (13031).

The spelling of 117801251 in words is "one hundred seventeen million, eight hundred one thousand, two hundred fifty-one".