1151205149 has 2 divisors, whose sum is σ = 1151205150. Its totient is φ = 1151205148.

The previous prime is 1151205061. The next prime is 1151205151. The reversal of 1151205149 is 9415021511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 649893049 + 501312100 = 25493^2 + 22390^2 .

It is a cyclic number.

It is not a de Polignac number, because 1151205149 - 2⁸ = 1151204893 is a prime.

It is a super-2 number, since 2×1151205149² = 2650546590168224402, which contains 22 as substring.

Together with 1151205151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1151295149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575602574 + 575602575.

It is an arithmetic number, because the mean of its divisors is an integer number (575602575).

Almost surely, 2^1151205149 is an apocalyptic number.

It is an amenable number.

1151205149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151205149 is an equidigital number, since it uses as much as digits as its factorization.

1151205149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 29.

The square root of 1151205149 is about 33929.4142153972. The cubic root of 1151205149 is about 1048.0554027997.

The spelling of 1151205149 in words is "one billion, one hundred fifty-one million, two hundred five thousand, one hundred forty-nine".