1125721521158 has 32 divisors (see below), whose sum is σ = 1828850298912. Its totient is φ = 516599942400.

The previous prime is 1125721521151. The next prime is 1125721521191. The reversal of 1125721521158 is 8511251275211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125721521151) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 30669485 + ... + 30706167.

It is an arithmetic number, because the mean of its divisors is an integer number (57151571841).

Almost surely, 2^{1125721521158} is an apocalyptic number.

1125721521158 is a deficient number, since it is larger than the sum of its proper divisors (703128777754).

1125721521158 is a wasteful number, since it uses less digits than its factorization.

1125721521158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43400.

The product of its digits is 56000, while the sum is 41.

Adding to 1125721521158 its reverse (8511251275211), we get a palindrome (9636972796369).

The spelling of 1125721521158 in words is "one trillion, one hundred twenty-five billion, seven hundred twenty-one million, five hundred twenty-one thousand, one hundred fifty-eight".