1172681 has 2 divisors, whose sum is σ = 1172682. Its totient is φ = 1172680.

The previous prime is 1172671. The next prime is 1172683. The reversal of 1172681 is 1862711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1092025 + 80656 = 1045^2 + 284^2 .

It is an emirp because it is prime and its reverse (1862711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1172681 - 2¹⁴ = 1156297 is a prime.

It is a super-2 number, since 2×1172681² = 2750361455522, which contains 22 as substring.

Together with 1172683, it forms a pair of twin primes.

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 1172681.

It is not a weakly prime, because it can be changed into another prime (1172683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586340 + 586341.

It is an arithmetic number, because the mean of its divisors is an integer number (586341).

2^1172681 is an apocalyptic number.

It is an amenable number.

1172681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1172681 is an equidigital number, since it uses as much as digits as its factorization.

1172681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 26.

The square root of 1172681 is about 1082.9039661946. The cubic root of 1172681 is about 105.4532485293.

The spelling of 1172681 in words is "one million, one hundred seventy-two thousand, six hundred eighty-one".