1147922161 has 9 divisors (see below), whose sum is σ = 1220031201. Its totient is φ = 1079855232.

The previous prime is 1147922143. The next prime is 1147922213. The reversal of 1147922161 is 1612297411.

The square root of 1147922161 is 33881.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 299947761 + 847974400 = 17319^2 + 29120^2 .

It is not a de Polignac number, because 1147922161 - 2⁵ = 1147922129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1147922131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 574981 + ... + 576973.

Almost surely, 2^1147922161 is an apocalyptic number.

1147922161 is the 33881-st square number.

1147922161 is the 16941-st centered octagonal number.

It is an amenable number.

1147922161 is a deficient number, since it is larger than the sum of its proper divisors (72109040).

1147922161 is an frugal number, since it uses more digits than its factorization.

1147922161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4020 (or 2010 counting only the distinct ones).

The product of its digits is 6048, while the sum is 34.

The cubic root of 1147922161 is about 1047.0581784947.

The spelling of 1147922161 in words is "one billion, one hundred forty-seven million, nine hundred twenty-two thousand, one hundred sixty-one".