11501265 has 64 divisors (see below), whose sum is σ = 21275136. Its totient is φ = 5271552.

The previous prime is 11501261. The next prime is 11501267. The reversal of 11501265 is 56210511.

It is not a de Polignac number, because 11501265 - 2² = 11501261 is a prime.

11501265 is a modest number, since divided by 1265 gives 1150 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11501261) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 216979 + ... + 217031.

It is an arithmetic number, because the mean of its divisors is an integer number (332424).

Almost surely, 2^11501265 is an apocalyptic number.

11501265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11501265 is a deficient number, since it is larger than the sum of its proper divisors (9773871).

11501265 is a wasteful number, since it uses less digits than its factorization.

11501265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 11501265 is about 3391.3515005083. The cubic root of 11501265 is about 225.7261477922.

Adding to 11501265 its reverse (56210511), we get a palindrome (67711776).

It can be divided in two parts, 1150 and 1265, that added together give a triangular number (2415 = T₆₉).

The spelling of 11501265 in words is "eleven million, five hundred one thousand, two hundred sixty-five".