1129520065 has 8 divisors (see below), whose sum is σ = 1355684328. Its totient is φ = 903442560.

The previous prime is 1129520059. The next prime is 1129520081. The reversal of 1129520065 is 5600259211.

It can be written as a sum of positive squares in 4 ways, for example, as 69105969 + 1060414096 = 8313^2 + 32564^2 .

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

It is not a de Polignac number, because 1129520065 - 2³ = 1129520057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11605 + ... + 48925.

It is an arithmetic number, because the mean of its divisors is an integer number (169460541).

Almost surely, 2^1129520065 is an apocalyptic number.

It is an amenable number.

1129520065 is a deficient number, since it is larger than the sum of its proper divisors (226164263).

1129520065 is an equidigital number, since it uses as much as digits as its factorization.

1129520065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43379.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1129520065 is about 33608.3332672122. Note that the first 3 decimals coincide. The cubic root of 1129520065 is about 1041.4329559805.

Adding to 1129520065 its reverse (5600259211), we get a palindrome (6729779276).

The spelling of 1129520065 in words is "one billion, one hundred twenty-nine million, five hundred twenty thousand, sixty-five".