1121656250 has 112 divisors (see below), whose sum is σ = 2480593248. Its totient is φ = 375000000.

The previous prime is 1121656219. The next prime is 1121656267. The reversal of 1121656250 is 526561211.

It is a happy number.

It is a sliding number, since 1121656250 = 97656250 + 1024000000 and 1/97656250 + 1/1024000000 = 0.00000001121656250.

It is a super-2 number, since 2×1121656250² = 2516225486328125000, which contains 22 as substring.

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 55 ways as a sum of consecutive naturals, for example, 4468625 + ... + 4468875.

It is an arithmetic number, because the mean of its divisors is an integer number (22148154).

Almost surely, 2^1121656250 is an apocalyptic number.

1121656250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1121656250 is an abundant number, since it is smaller than the sum of its proper divisors (1358936998).

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

1121656250 is an equidigital number, since it uses as much as digits as its factorization.

1121656250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1121656250 is about 33491.1368872423. The cubic root of 1121656250 is about 1039.0104770720.

The spelling of 1121656250 in words is "one billion, one hundred twenty-one million, six hundred fifty-six thousand, two hundred fifty".