1121992642 has 8 divisors (see below), whose sum is σ = 1710579132. Its totient is φ = 551799600.

The previous prime is 1121992621. The next prime is 1121992643. The reversal of 1121992642 is 2462991211.

It can be written as a sum of positive squares in 2 ways, for example, as 1069878681 + 52113961 = 32709^2 + 7219^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1121992643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4598209 + ... + 4598452.

Almost surely, 2^1121992642 is an apocalyptic number.

1121992642 is a deficient number, since it is larger than the sum of its proper divisors (588586490).

1121992642 is an equidigital number, since it uses as much as digits as its factorization.

1121992642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9196724.

The product of its digits is 15552, while the sum is 37.

The square root of 1121992642 is about 33496.1586155786. The cubic root of 1121992642 is about 1039.1143353553.

The spelling of 1121992642 in words is "one billion, one hundred twenty-one million, nine hundred ninety-two thousand, six hundred forty-two".