1121255140 has 48 divisors (see below), whose sum is σ = 2383214400. Its totient is φ = 443083392.

The previous prime is 1121255123. The next prime is 1121255153. The reversal of 1121255140 is 415521211.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1516891 + ... + 1517629.

It is an arithmetic number, because the mean of its divisors is an integer number (49650300).

Almost surely, 2^1121255140 is an apocalyptic number.

1121255140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121255140 is an abundant number, since it is smaller than the sum of its proper divisors (1261959260).

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

1121255140 is a wasteful number, since it uses less digits than its factorization.

1121255140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564 (or 1562 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1121255140 is about 33485.1480510390. The cubic root of 1121255140 is about 1038.8866104892.

Adding to 1121255140 its reverse (415521211), we get a palindrome (1536776351).

The spelling of 1121255140 in words is "one billion, one hundred twenty-one million, two hundred fifty-five thousand, one hundred forty".