1121445025 has 12 divisors (see below), whose sum is σ = 1428176572. Its totient is φ = 872907840.

The previous prime is 1121445023. The next prime is 1121445029. The reversal of 1121445025 is 5205441211.

It can be written as a sum of positive squares in 6 ways, for example, as 8088336 + 1113356689 = 2844^2 + 33367^2 .

It is not a de Polignac number, because 1121445025 - 2¹ = 1121445023 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121445023) 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, 605262 + ... + 607111.

Almost surely, 2^1121445025 is an apocalyptic number.

It is an amenable number.

1121445025 is a deficient number, since it is larger than the sum of its proper divisors (306731547).

1121445025 is a wasteful number, since it uses less digits than its factorization.

1121445025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212420 (or 1212415 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1121445025 is about 33487.9832925185. The cubic root of 1121445025 is about 1038.9452524646.

Adding to 1121445025 its reverse (5205441211), we get a palindrome (6326886236).

The spelling of 1121445025 in words is "one billion, one hundred twenty-one million, four hundred forty-five thousand, twenty-five".