11778251 has 2 divisors, whose sum is σ = 11778252. Its totient is φ = 11778250.

The previous prime is 11778241. The next prime is 11778253. The reversal of 11778251 is 15287711.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11778251 is a prime.

Together with 11778253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11778253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5889125 + 5889126.

It is an arithmetic number, because the mean of its divisors is an integer number (5889126).

Almost surely, 2^11778251 is an apocalyptic number.

11778251 is a deficient number, since it is larger than the sum of its proper divisors (1).

11778251 is an equidigital number, since it uses as much as digits as its factorization.

11778251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3920, while the sum is 32.

The square root of 11778251 is about 3431.9456580779. The cubic root of 11778251 is about 227.5238537159.

The spelling of 11778251 in words is "eleven million, seven hundred seventy-eight thousand, two hundred fifty-one".