1127821642 has 8 divisors (see below), whose sum is σ = 1737455076. Its totient is φ = 548669952.

The previous prime is 1127821637. The next prime is 1127821661. The reversal of 1127821642 is 2461287211.

It can be written as a sum of positive squares in 2 ways, for example, as 1098325881 + 29495761 = 33141^2 + 5431^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1127821598 and 1127821607.

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, 7620343 + ... + 7620490.

Almost surely, 2^1127821642 is an apocalyptic number.

1127821642 is a deficient number, since it is larger than the sum of its proper divisors (609633434).

1127821642 is a wasteful number, since it uses less digits than its factorization.

1127821642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15240872.

The product of its digits is 10752, while the sum is 34.

The square root of 1127821642 is about 33583.0558764386. The cubic root of 1127821642 is about 1040.9107043797.

The spelling of 1127821642 in words is "one billion, one hundred twenty-seven million, eight hundred twenty-one thousand, six hundred forty-two".