1156025065 has 12 divisors (see below), whose sum is σ = 1502149644. Its totient is φ = 853679424.

The previous prime is 1156025009. The next prime is 1156025071. The reversal of 1156025065 is 5605206511.

It can be written as a sum of positive squares in 6 ways, for example, as 99840064 + 1056185001 = 9992^2 + 32499^2 .

It is not a de Polignac number, because 1156025065 - 2²¹ = 1153927913 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, 683194 + ... + 684883.

It is an arithmetic number, because the mean of its divisors is an integer number (125179137).

Almost surely, 2^1156025065 is an apocalyptic number.

It is an amenable number.

1156025065 is a deficient number, since it is larger than the sum of its proper divisors (346124579).

1156025065 is a wasteful number, since it uses less digits than its factorization.

1156025065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368108 (or 1368095 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 1156025065 is about 34000.3686009431. The cubic root of 1156025065 is about 1049.5160475743.

The spelling of 1156025065 in words is "one billion, one hundred fifty-six million, twenty-five thousand, sixty-five".