11651265 has 12 divisors (see below), whose sum is σ = 20195604. Its totient is φ = 6213984.

The previous prime is 11651249. The next prime is 11651267. The reversal of 11651265 is 56215611.

It is a happy number.

11651265 is a `hidden beast` number, since 1 + 1 + 651 + 2 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5702544 + 5948721 = 2388^2 + 2439^2 .

It is not a de Polignac number, because 11651265 - 2⁴ = 11651249 is a prime.

It is a super-2 number, since 2×11651265² = 271503952200450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11651267) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129414 + ... + 129503.

It is an arithmetic number, because the mean of its divisors is an integer number (1682967).

Almost surely, 2^11651265 is an apocalyptic number.

11651265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11651265 is a deficient number, since it is larger than the sum of its proper divisors (8544339).

11651265 is a wasteful number, since it uses less digits than its factorization.

11651265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258928 (or 258925 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 11651265 is about 3413.3949375951. The cubic root of 11651265 is about 226.7032224298.

Adding to 11651265 its reverse (56215611), we get a palindrome (67866876).

The spelling of 11651265 in words is "eleven million, six hundred fifty-one thousand, two hundred sixty-five".