1131201045 has 40 divisors (see below), whose sum is σ = 2183776056. Its totient is φ = 556896384.

The previous prime is 1131201031. The next prime is 1131201073. The reversal of 1131201045 is 5401021311.

It can be written as a sum of positive squares in 4 ways, for example, as 233539524 + 897661521 = 15282^2 + 29961^2 .

It is not a de Polignac number, because 1131201045 - 2¹¹ = 1131198997 is a prime.

It is a Curzon number.

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 39 ways as a sum of consecutive naturals, for example, 102162 + ... + 112691.

Almost surely, 2^1131201045 is an apocalyptic number.

1131201045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1131201045 is a deficient number, since it is larger than the sum of its proper divisors (1052575011).

1131201045 is a wasteful number, since it uses less digits than its factorization.

1131201045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214883 (or 214874 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1131201045 is about 33633.3323505120. The cubic root of 1131201045 is about 1041.9493287596.

Adding to 1131201045 its reverse (5401021311), we get a palindrome (6532222356).

The spelling of 1131201045 in words is "one billion, one hundred thirty-one million, two hundred one thousand, forty-five".