1121802025 has 12 divisors (see below), whose sum is σ = 1424963484. Its totient is φ = 875552000.

The previous prime is 1121802007. The next prime is 1121802029. The reversal of 1121802025 is 5202081211.

It can be written as a sum of positive squares in 6 ways, for example, as 193015449 + 928786576 = 13893^2 + 30476^2 .

It is not a de Polignac number, because 1121802025 - 2²⁵ = 1088247593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121801987 and 1121802005.

It is not an unprimeable number, because it can be changed into a prime (1121802029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 546196 + ... + 548245.

It is an arithmetic number, because the mean of its divisors is an integer number (118746957).

Almost surely, 2^1121802025 is an apocalyptic number.

It is an amenable number.

1121802025 is a deficient number, since it is larger than the sum of its proper divisors (303161459).

1121802025 is a wasteful number, since it uses less digits than its factorization.

1121802025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094492 (or 1094487 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 1121802025 is about 33493.3131385953. The cubic root of 1121802025 is about 1039.0554864622.

Adding to 1121802025 its reverse (5202081211), we get a palindrome (6323883236).

The spelling of 1121802025 in words is "one billion, one hundred twenty-one million, eight hundred two thousand, twenty-five".