1296181 has 2 divisors, whose sum is σ = 1296182. Its totient is φ = 1296180.

The previous prime is 1296167. The next prime is 1296187. The reversal of 1296181 is 1816921.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 695556 + 600625 = 834^2 + 775^2 .

It is a cyclic number.

It is not a de Polignac number, because 1296181 - 2¹³ = 1287989 is a prime.

It is a super-2 number, since 2×1296181² = 3360170369522, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1296187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648090 + 648091.

It is an arithmetic number, because the mean of its divisors is an integer number (648091).

2^1296181 is an apocalyptic number.

It is an amenable number.

1296181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296181 is an equidigital number, since it uses as much as digits as its factorization.

1296181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 28.

The square root of 1296181 is about 1138.4994510319. The cubic root of 1296181 is about 109.0323109328.

The spelling of 1296181 in words is "one million, two hundred ninety-six thousand, one hundred eighty-one".