11751861 has 16 divisors (see below), whose sum is σ = 17994240. Its totient is φ = 6747120.

The previous prime is 11751853. The next prime is 11751881. The reversal of 11751861 is 16815711.

It is not a de Polignac number, because 11751861 - 2³ = 11751853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11751851) 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 15 ways as a sum of consecutive naturals, for example, 8745 + ... + 9998.

It is an arithmetic number, because the mean of its divisors is an integer number (1124640).

Almost surely, 2^11751861 is an apocalyptic number.

11751861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11751861 is a deficient number, since it is larger than the sum of its proper divisors (6242379).

11751861 is a wasteful number, since it uses less digits than its factorization.

11751861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18776.

The product of its digits is 1680, while the sum is 30.

The square root of 11751861 is about 3428.0987442021. The cubic root of 11751861 is about 227.3537989122.

The spelling of 11751861 in words is "eleven million, seven hundred fifty-one thousand, eight hundred sixty-one".