1155522149 has 4 divisors (see below), whose sum is σ = 1161977760. Its totient is φ = 1149066540.

The previous prime is 1155522143. The next prime is 1155522157. The reversal of 1155522149 is 9412255511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1155522149 - 2¹² = 1155518053 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155522143) 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 in 3 ways as a sum of consecutive naturals, for example, 3227537 + ... + 3227894.

It is an arithmetic number, because the mean of its divisors is an integer number (290494440).

Almost surely, 2^1155522149 is an apocalyptic number.

It is an amenable number.

1155522149 is a deficient number, since it is larger than the sum of its proper divisors (6455611).

1155522149 is an equidigital number, since it uses as much as digits as its factorization.

1155522149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6455610.

The product of its digits is 18000, while the sum is 35.

The square root of 1155522149 is about 33992.9720530583. The cubic root of 1155522149 is about 1049.3638320248.

The spelling of 1155522149 in words is "one billion, one hundred fifty-five million, five hundred twenty-two thousand, one hundred forty-nine".