1131407545 has 12 divisors (see below), whose sum is σ = 1442252844. Its totient is φ = 851882240.

The previous prime is 1131407533. The next prime is 1131407591. The reversal of 1131407545 is 5457041311.

It can be written as a sum of positive squares in 6 ways, for example, as 23116864 + 1108290681 = 4808^2 + 33291^2 .

It is not a de Polignac number, because 1131407545 - 2²³ = 1123018937 is a prime.

It is a Duffinian 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, 390046 + ... + 392935.

It is an arithmetic number, because the mean of its divisors is an integer number (120187737).

Almost surely, 2^1131407545 is an apocalyptic number.

It is an amenable number.

1131407545 is a deficient number, since it is larger than the sum of its proper divisors (310845299).

1131407545 is an equidigital number, since it uses as much as digits as its factorization.

1131407545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783020 (or 783003 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 1131407545 is about 33636.4020816734. The cubic root of 1131407545 is about 1042.0127272881.

Adding to 1131407545 its reverse (5457041311), we get a palindrome (6588448856).

The spelling of 1131407545 in words is "one billion, one hundred thirty-one million, four hundred seven thousand, five hundred forty-five".