1175981 has 2 divisors, whose sum is σ = 1175982. Its totient is φ = 1175980.

The previous prime is 1175969. The next prime is 1175989. The reversal of 1175981 is 1895711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 855625 + 320356 = 925^2 + 566^2 .

It is an emirp because it is prime and its reverse (1895711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1175981 - 2¹⁴ = 1159597 is a prime.

It is a super-2 number, since 2×1175981² = 2765862624722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1175989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 587990 + 587991.

It is an arithmetic number, because the mean of its divisors is an integer number (587991).

2^1175981 is an apocalyptic number.

It is an amenable number.

1175981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1175981 is an equidigital number, since it uses as much as digits as its factorization.

1175981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 32.

The square root of 1175981 is about 1084.4265765832. The cubic root of 1175981 is about 105.5520733026.

The spelling of 1175981 in words is "one million, one hundred seventy-five thousand, nine hundred eighty-one".