1121656140 has 96 divisors (see below), whose sum is σ = 3806853120. Its totient is φ = 271915200.

The previous prime is 1121656117. The next prime is 1121656153. The reversal of 1121656140 is 416561211.

1121656140 is a `hidden beast` number, since 1 + 1 + 2 + 1 + 656 + 1 + 4 + 0 = 666.

It is a super-2 number, since 2×1121656140² = 2516224992799399200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88476 + ... + 100355.

It is an arithmetic number, because the mean of its divisors is an integer number (39654720).

Almost surely, 2^1121656140 is an apocalyptic number.

1121656140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121656140 is an abundant number, since it is smaller than the sum of its proper divisors (2685196980).

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

1121656140 is a wasteful number, since it uses less digits than its factorization.

1121656140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188860 (or 188852 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1121656140 is about 33491.1352450167. The cubic root of 1121656140 is about 1039.0104431070.

The spelling of 1121656140 in words is "one billion, one hundred twenty-one million, six hundred fifty-six thousand, one hundred forty".