1230181 has 2 divisors, whose sum is σ = 1230182. Its totient is φ = 1230180.

The previous prime is 1230169. The next prime is 1230199. The reversal of 1230181 is 1810321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 933156 + 297025 = 966^2 + 545^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230181 - 2¹¹ = 1228133 is a prime.

It is a super-2 number, since 2×1230181² = 3026690585522, 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 (1230881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615090 + 615091.

It is an arithmetic number, because the mean of its divisors is an integer number (615091).

2^1230181 is an apocalyptic number.

It is an amenable number.

1230181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230181 is an equidigital number, since it uses as much as digits as its factorization.

1230181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1230181 is about 1109.1352487411. The cubic root of 1230181 is about 107.1493822904.

The spelling of 1230181 in words is "one million, two hundred thirty thousand, one hundred eighty-one".