1121557005 has 48 divisors (see below), whose sum is σ = 2009629440. Its totient is φ = 578292864.

The previous prime is 1121557001. The next prime is 1121557013. The reversal of 1121557005 is 5007551211.

It is not a de Polignac number, because 1121557005 - 2² = 1121557001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121557005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121557001) 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, 172351 + ... + 178739.

It is an arithmetic number, because the mean of its divisors is an integer number (41867280).

Almost surely, 2^1121557005 is an apocalyptic number.

1121557005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1121557005 is a deficient number, since it is larger than the sum of its proper divisors (888072435).

1121557005 is a wasteful number, since it uses less digits than its factorization.

1121557005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6530 (or 6527 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 27.

The square root of 1121557005 is about 33489.6551938057. The cubic root of 1121557005 is about 1038.9798320218.

The spelling of 1121557005 in words is "one billion, one hundred twenty-one million, five hundred fifty-seven thousand, five".