1122178561 has 8 divisors (see below), whose sum is σ = 1287995904. Its totient is φ = 957737760.

The previous prime is 1122178549. The next prime is 1122178567. The reversal of 1122178561 is 1658712211.

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

It is not a de Polignac number, because 1122178561 - 2⁷ = 1122178433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1122178567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342385 + ... + 345646.

It is an arithmetic number, because the mean of its divisors is an integer number (160999488).

Almost surely, 2^1122178561 is an apocalyptic number.

It is an amenable number.

1122178561 is a deficient number, since it is larger than the sum of its proper divisors (165817343).

1122178561 is an equidigital number, since it uses as much as digits as its factorization.

1122178561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688271.

The product of its digits is 6720, while the sum is 34.

The square root of 1122178561 is about 33498.9337292995. The cubic root of 1122178561 is about 1039.1717274216.

The spelling of 1122178561 in words is "one billion, one hundred twenty-two million, one hundred seventy-eight thousand, five hundred sixty-one".