1188857 has 2 divisors, whose sum is σ = 1188858. Its totient is φ = 1188856.

The previous prime is 1188851. The next prime is 1188899. The reversal of 1188857 is 7588811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 942841 + 246016 = 971^2 + 496^2 .

It is a cyclic number.

It is not a de Polignac number, because 1188857 - 2⁴ = 1188841 is a prime.

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 1188857.

It is not a weakly prime, because it can be changed into another prime (1188851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594428 + 594429.

It is an arithmetic number, because the mean of its divisors is an integer number (594429).

2^1188857 is an apocalyptic number.

It is an amenable number.

1188857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1188857 is an equidigital number, since it uses as much as digits as its factorization.

1188857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17920, while the sum is 38.

The square root of 1188857 is about 1090.3471924117. The cubic root of 1188857 is about 105.9359111818.

The spelling of 1188857 in words is "one million, one hundred eighty-eight thousand, eight hundred fifty-seven".