1121722725 has 24 divisors (see below), whose sum is σ = 1897716832. Its totient is φ = 584337600.

The previous prime is 1121722699. The next prime is 1121722753. The reversal of 1121722725 is 5272271211.

It is not a de Polignac number, because 1121722725 - 2⁶ = 1121722661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121722692 and 1121722701.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 170686 + ... + 177135.

Almost surely, 2^1121722725 is an apocalyptic number.

1121722725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1121722725 is a deficient number, since it is larger than the sum of its proper divisors (775994107).

1121722725 is a wasteful number, since it uses less digits than its factorization.

1121722725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347877 (or 347872 counting only the distinct ones).

The product of its digits is 3920, while the sum is 30.

The square root of 1121722725 is about 33492.1292992846. The cubic root of 1121722725 is about 1039.0310023316.

Adding to 1121722725 its reverse (5272271211), we get a palindrome (6393993936).

The spelling of 1121722725 in words is "one billion, one hundred twenty-one million, seven hundred twenty-two thousand, seven hundred twenty-five".