1161857 has 2 divisors, whose sum is σ = 1161858. Its totient is φ = 1161856.

The previous prime is 1161851. The next prime is 1161871. The reversal of 1161857 is 7581611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 982081 + 179776 = 991^2 + 424^2 .

It is an emirp because it is prime and its reverse (7581611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1161857 - 2⁴ = 1161841 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (1161851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580928 + 580929.

It is an arithmetic number, because the mean of its divisors is an integer number (580929).

2^1161857 is an apocalyptic number.

It is an amenable number.

1161857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161857 is an equidigital number, since it uses as much as digits as its factorization.

1161857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 29.

The square root of 1161857 is about 1077.8947072882. The cubic root of 1161857 is about 105.1277960208.

The spelling of 1161857 in words is "one million, one hundred sixty-one thousand, eight hundred fifty-seven".