1121651140 has 24 divisors (see below), whose sum is σ = 2371282200. Its totient is φ = 445648128.

The previous prime is 1121651123. The next prime is 1121651161. The reversal of 1121651140 is 411561211.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 191767104 + 929884036 = 13848^2 + 30494^2 .

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 7 ways as a sum of consecutive naturals, for example, 185217 + ... + 191176.

It is an arithmetic number, because the mean of its divisors is an integer number (98803425).

Almost surely, 2^1121651140 is an apocalyptic number.

1121651140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121651140 is an abundant number, since it is smaller than the sum of its proper divisors (1249631060).

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

1121651140 is a wasteful number, since it uses less digits than its factorization.

1121651140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376551 (or 376549 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 1121651140 is about 33491.0605983149. The cubic root of 1121651140 is about 1039.0088992412.

The spelling of 1121651140 in words is "one billion, one hundred twenty-one million, six hundred fifty-one thousand, one hundred forty".