1121161408 has 56 divisors (see below), whose sum is σ = 2269229904. Its totient is φ = 549504000.

The previous prime is 1121161387. The next prime is 1121161411. The reversal of 1121161408 is 8041611211.

It is an unprimeable number.

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, 690838 + ... + 692458.

Almost surely, 2^1121161408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121161408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1134614952).

1121161408 is an abundant number, since it is smaller than the sum of its proper divisors (1148068496).

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

1121161408 is a wasteful number, since it uses less digits than its factorization.

1121161408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841 (or 1831 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 1121161408 is about 33483.7484162093. The cubic root of 1121161408 is about 1038.8576608981.

Adding to 1121161408 its reverse (8041611211), we get a palindrome (9162772619).

The spelling of 1121161408 in words is "one billion, one hundred twenty-one million, one hundred sixty-one thousand, four hundred eight".