1131201545 has 8 divisors (see below), whose sum is σ = 1359563400. Its totient is φ = 903546880.

The previous prime is 1131201541. The next prime is 1131201569. The reversal of 1131201545 is 5451021311.

1131201545 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 69288976 + 1061912569 = 8324^2 + 32587^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1131201545 - 2² = 1131201541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1131201545.

It is not an unprimeable number, because it can be changed into a prime (1131201541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173270 + ... + 179679.

It is an arithmetic number, because the mean of its divisors is an integer number (169945425).

Almost surely, 2^1131201545 is an apocalyptic number.

It is an amenable number.

1131201545 is a deficient number, since it is larger than the sum of its proper divisors (228361855).

1131201545 is an equidigital number, since it uses as much as digits as its factorization.

1131201545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353595.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1131201545 is about 33633.3397836135. The cubic root of 1131201545 is about 1041.9494822762.

Adding to 1131201545 its reverse (5451021311), we get a palindrome (6582222856).

The spelling of 1131201545 in words is "one billion, one hundred thirty-one million, two hundred one thousand, five hundred forty-five".