1121161525 has 12 divisors (see below), whose sum is σ = 1516626144. Its totient is φ = 815390000.

The previous prime is 1121161513. The next prime is 1121161541. The reversal of 1121161525 is 5251611211.

It is not a de Polignac number, because 1121161525 - 2⁵ = 1121161493 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 1121161525.

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, 2038201 + ... + 2038750.

It is an arithmetic number, because the mean of its divisors is an integer number (126385512).

Almost surely, 2^1121161525 is an apocalyptic number.

It is an amenable number.

1121161525 is a deficient number, since it is larger than the sum of its proper divisors (395464619).

1121161525 is a wasteful number, since it uses less digits than its factorization.

1121161525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4076972 (or 4076967 counting only the distinct ones).

The product of its digits is 600, while the sum is 25.

The square root of 1121161525 is about 33483.7501633255. The cubic root of 1121161525 is about 1038.8576970351.

Adding to 1121161525 its reverse (5251611211), we get a palindrome (6372772736).

The spelling of 1121161525 in words is "one billion, one hundred twenty-one million, one hundred sixty-one thousand, five hundred twenty-five".