1091172442 has 8 divisors (see below), whose sum is σ = 1676679732. Its totient is φ = 532279200.

The previous prime is 1091172431. The next prime is 1091172493. The reversal of 1091172442 is 2442711901.

It can be written as a sum of positive squares in 2 ways, for example, as 730134441 + 361038001 = 27021^2 + 19001^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 6653409 + ... + 6653572.

Almost surely, 2^1091172442 is an apocalyptic number.

1091172442 is a deficient number, since it is larger than the sum of its proper divisors (585507290).

1091172442 is a wasteful number, since it uses less digits than its factorization.

1091172442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13307024.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1091172442 is about 33032.8993883371. The cubic root of 1091172442 is about 1029.5113281881.

The spelling of 1091172442 in words is "one billion, ninety-one million, one hundred seventy-two thousand, four hundred forty-two".