1121152525 has 12 divisors (see below), whose sum is σ = 1390842900. Its totient is φ = 896526080.

The previous prime is 1121152471. The next prime is 1121152537. The reversal of 1121152525 is 5252511211.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 13793796 + 1107358729 = 3714^2 + 33277^2 .

It is not a de Polignac number, because 1121152525 - 2¹⁷ = 1121021453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 1121152525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56631 + ... + 73819.

It is an arithmetic number, because the mean of its divisors is an integer number (115903575).

Almost surely, 2^1121152525 is an apocalyptic number.

It is an amenable number.

1121152525 is a deficient number, since it is larger than the sum of its proper divisors (269690375).

1121152525 is a wasteful number, since it uses less digits than its factorization.

1121152525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19808 (or 19803 counting only the distinct ones).

The product of its digits is 1000, while the sum is 25.

The square root of 1121152525 is about 33483.6157695073. The cubic root of 1121152525 is about 1038.8549172560.

Adding to 1121152525 its reverse (5252511211), we get a palindrome (6373663736).

It can be divided in two parts, 11211 and 52525, that added together give a palindrome (63736).

The spelling of 1121152525 in words is "one billion, one hundred twenty-one million, one hundred fifty-two thousand, five hundred twenty-five".