1265601160 has 32 divisors (see below), whose sum is σ = 2894290200. Its totient is φ = 497940480.

The previous prime is 1265601149. The next prime is 1265601163. The reversal of 1265601160 is 611065621.

It can be written as a sum of positive squares in 4 ways, for example, as 1076758596 + 188842564 = 32814^2 + 13742^2 .

It is not an unprimeable number, because it can be changed into a prime (1265601163) 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, 256905 + ... + 261784.

Almost surely, 2^1265601160 is an apocalyptic number.

1265601160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1265601160 is an abundant number, since it is smaller than the sum of its proper divisors (1628689040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1265601160 is a wasteful number, since it uses less digits than its factorization.

1265601160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518761 (or 518757 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1265601160 is about 35575.2886144301. The cubic root of 1265601160 is about 1081.6803859388.

Adding to 1265601160 its reverse (611065621), we get a palindrome (1876666781).

The spelling of 1265601160 in words is "one billion, two hundred sixty-five million, six hundred one thousand, one hundred sixty".