11778457 has 2 divisors, whose sum is σ = 11778458. Its totient is φ = 11778456.

The previous prime is 11778451. The next prime is 11778463. The reversal of 11778457 is 75487711.

It is a balanced prime because it is at equal distance from previous prime (11778451) and next prime (11778463).

It can be written as a sum of positive squares in only one way, i.e., 8433216 + 3345241 = 2904^2 + 1829^2 .

It is a cyclic number.

It is not a de Polignac number, because 11778457 - 2¹⁵ = 11745689 is a prime.

It is not a weakly prime, because it can be changed into another prime (11778451) 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, 5889228 + 5889229.

It is an arithmetic number, because the mean of its divisors is an integer number (5889229).

Almost surely, 2^11778457 is an apocalyptic number.

It is an amenable number.

11778457 is a deficient number, since it is larger than the sum of its proper divisors (1).

11778457 is an equidigital number, since it uses as much as digits as its factorization.

11778457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54880, while the sum is 40.

The square root of 11778457 is about 3431.9756700769. The cubic root of 11778457 is about 227.5251801618.

The spelling of 11778457 in words is "eleven million, seven hundred seventy-eight thousand, four hundred fifty-seven".