1119206561 has 12 divisors (see below), whose sum is σ = 1260212772. Its totient is φ = 992640000.

The previous prime is 1119206551. The next prime is 1119206597. The reversal of 1119206561 is 1656029111.

It can be written as a sum of positive squares in 2 ways, for example, as 27300625 + 1091905936 = 5225^2 + 33044^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1119206561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1119206551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107840 + ... + 117761.

It is an arithmetic number, because the mean of its divisors is an integer number (105017731).

Almost surely, 2^1119206561 is an apocalyptic number.

1119206561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1119206561 is a deficient number, since it is larger than the sum of its proper divisors (141006211).

1119206561 is a wasteful number, since it uses less digits than its factorization.

1119206561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225664 (or 225653 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 1119206561 is about 33454.5446987401. The cubic root of 1119206561 is about 1038.2535286678.

The spelling of 1119206561 in words is "one billion, one hundred nineteen million, two hundred six thousand, five hundred sixty-one".