1081712196 has 18 divisors (see below), whose sum is σ = 2734328142. Its totient is φ = 360570720.

The previous prime is 1081712189. The next prime is 1081712249. The reversal of 1081712196 is 6912171801.

It can be written as a sum of positive squares in only one way, i.e., 1081094400 + 617796 = 32880^2 + 786^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 30047561 = 1081712196 / (1 + 0 + 8 + 1 + 7 + 1 + 2 + 1 + 9 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 1081712196.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15023745 + ... + 15023816.

It is an arithmetic number, because the mean of its divisors is an integer number (151907119).

Almost surely, 2^1081712196 is an apocalyptic number.

It is an amenable number.

1081712196 is an abundant number, since it is smaller than the sum of its proper divisors (1652615946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1081712196 is a wasteful number, since it uses less digits than its factorization.

1081712196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30047571 (or 30047566 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 36.

The square root of 1081712196 is about 32889.3933662511. The cubic root of 1081712196 is about 1026.5274695093.

Adding to 1081712196 its reverse (6912171801), we get a palindrome (7993883997).

The spelling of 1081712196 in words is "one billion, eighty-one million, seven hundred twelve thousand, one hundred ninety-six".