1121025187 has 2 divisors, whose sum is σ = 1121025188. Its totient is φ = 1121025186.

The previous prime is 1121025119. The next prime is 1121025209. The reversal of 1121025187 is 7815201211.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121025187 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121025107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560512593 + 560512594.

It is an arithmetic number, because the mean of its divisors is an integer number (560512594).

Almost surely, 2^1121025187 is an apocalyptic number.

1121025187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121025187 is an equidigital number, since it uses as much as digits as its factorization.

1121025187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 28.

The square root of 1121025187 is about 33481.7142183610. The cubic root of 1121025187 is about 1038.8155854930.

Adding to 1121025187 its reverse (7815201211), we get a palindrome (8936226398).

The spelling of 1121025187 in words is "one billion, one hundred twenty-one million, twenty-five thousand, one hundred eighty-seven".