1121556705 has 48 divisors (see below), whose sum is σ = 1886322816. Its totient is φ = 568986880.

The previous prime is 1121556679. The next prime is 1121556707. The reversal of 1121556705 is 5076551211.

It is a happy number.

It is not a de Polignac number, because 1121556705 - 2¹⁰ = 1121555681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121556707) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2229484 + ... + 2229986.

It is an arithmetic number, because the mean of its divisors is an integer number (39298392).

Almost surely, 2^1121556705 is an apocalyptic number.

1121556705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1121556705 is a deficient number, since it is larger than the sum of its proper divisors (764766111).

1121556705 is a wasteful number, since it uses less digits than its factorization.

1121556705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838 (or 815 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 33.

The square root of 1121556705 is about 33489.6507148104. The cubic root of 1121556705 is about 1038.9797393846.

The spelling of 1121556705 in words is "one billion, one hundred twenty-one million, five hundred fifty-six thousand, seven hundred five".