11778451 has 2 divisors, whose sum is σ = 11778452. Its totient is φ = 11778450.

The previous prime is 11778413. The next prime is 11778457. The reversal of 11778451 is 15487711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11778451 - 2¹⁹ = 11254163 is a prime.

It is not a weakly prime, because it can be changed into another prime (11778457) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5889225 + 5889226.

It is an arithmetic number, because the mean of its divisors is an integer number (5889226).

Almost surely, 2^11778451 is an apocalyptic number.

11778451 is a deficient number, since it is larger than the sum of its proper divisors (1).

11778451 is an equidigital number, since it uses as much as digits as its factorization.

11778451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7840, while the sum is 34.

The square root of 11778451 is about 3431.9747959447. The cubic root of 11778451 is about 227.5251415277.

The spelling of 11778451 in words is "eleven million, seven hundred seventy-eight thousand, four hundred fifty-one".