1149258161 has 2 divisors, whose sum is σ = 1149258162. Its totient is φ = 1149258160.

The previous prime is 1149258113. The next prime is 1149258211. The reversal of 1149258161 is 1618529411.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 628003600 + 521254561 = 25060^2 + 22831^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1149258161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1149252161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 574629080 + 574629081.

It is an arithmetic number, because the mean of its divisors is an integer number (574629081).

Almost surely, 2^1149258161 is an apocalyptic number.

It is an amenable number.

1149258161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1149258161 is an equidigital number, since it uses as much as digits as its factorization.

1149258161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 38.

The square root of 1149258161 is about 33900.7103317910. The cubic root of 1149258161 is about 1047.4642244319.

The spelling of 1149258161 in words is "one billion, one hundred forty-nine million, two hundred fifty-eight thousand, one hundred sixty-one".