11151261 has 24 divisors (see below), whose sum is σ = 17823936. Its totient is φ = 6661440.

The previous prime is 11151247. The next prime is 11151277. The reversal of 11151261 is 16215111.

It is a happy number.

It is not a de Polignac number, because 11151261 - 2⁹ = 11150749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11151241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6456 + ... + 7998.

It is an arithmetic number, because the mean of its divisors is an integer number (742664).

Almost surely, 2^11151261 is an apocalyptic number.

11151261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11151261 is a deficient number, since it is larger than the sum of its proper divisors (6672675).

11151261 is a wasteful number, since it uses less digits than its factorization.

11151261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633 (or 1630 counting only the distinct ones).

The product of its digits is 60, while the sum is 18.

The square root of 11151261 is about 3339.3503859284. The cubic root of 11151261 is about 223.4127701875.

Adding to 11151261 its reverse (16215111), we get a palindrome (27366372).

The spelling of 11151261 in words is "eleven million, one hundred fifty-one thousand, two hundred sixty-one".