1265153065 has 16 divisors (see below), whose sum is σ = 1728210816. Its totient is φ = 880105600.

The previous prime is 1265153063. The next prime is 1265153077. The reversal of 1265153065 is 5603515621.

It is not a de Polignac number, because 1265153065 - 2¹ = 1265153063 is a prime.

It is a super-2 number, since 2×1265153065² = 3201224555757788450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1265153065.

It is not an unprimeable number, because it can be changed into a prime (1265153063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 498796 + ... + 501325.

It is an arithmetic number, because the mean of its divisors is an integer number (108013176).

Almost surely, 2^1265153065 is an apocalyptic number.

It is an amenable number.

1265153065 is a deficient number, since it is larger than the sum of its proper divisors (463057751).

1265153065 is a wasteful number, since it uses less digits than its factorization.

1265153065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000160.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 1265153065 is about 35568.9902161982. The cubic root of 1265153065 is about 1081.5527120179.

Adding to 1265153065 its reverse (5603515621), we get a palindrome (6868668686).

It can be divided in two parts, 1265 and 153065, that multiplied together give a square (193627225 = 13915²).

The spelling of 1265153065 in words is "one billion, two hundred sixty-five million, one hundred fifty-three thousand, sixty-five".