1151111525 has 12 divisors (see below), whose sum is σ = 1432692900. Its totient is φ = 917460480.

The previous prime is 1151111519. The next prime is 1151111537. The reversal of 1151111525 is 5251111511.

It can be written as a sum of positive squares in 6 ways, for example, as 400680289 + 750431236 = 20017^2 + 27394^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1151111525 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1151111525.

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 11 ways as a sum of consecutive naturals, for example, 78860 + ... + 92309.

It is an arithmetic number, because the mean of its divisors is an integer number (119391075).

Almost surely, 2^1151111525 is an apocalyptic number.

It is an amenable number.

1151111525 is a deficient number, since it is larger than the sum of its proper divisors (281581375).

1151111525 is a wasteful number, since it uses less digits than its factorization.

1151111525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171448 (or 171443 counting only the distinct ones).

The product of its digits is 250, while the sum is 23.

The square root of 1151111525 is about 33928.0344995109. The cubic root of 1151111525 is about 1048.0269903141.

The spelling of 1151111525 in words is "one billion, one hundred fifty-one million, one hundred eleven thousand, five hundred twenty-five".