11767861 has 16 divisors (see below), whose sum is σ = 13926528. Its totient is φ = 9734400.

The previous prime is 11767849. The next prime is 11767867. The reversal of 11767861 is 16876711.

It is a 4-Lehmer number, since φ(11767861) divides (11767861-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 11767861 - 2⁷ = 11767733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11767861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11767867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37441 + ... + 37753.

It is an arithmetic number, because the mean of its divisors is an integer number (870408).

It is a Poulet number, since it divides 2^11767860-1.

Almost surely, 2^11767861 is an apocalyptic number.

11767861 is the 1834-th nonagonal number.

It is an amenable number.

11767861 is a deficient number, since it is larger than the sum of its proper divisors (2158667).

11767861 is a wasteful number, since it uses less digits than its factorization.

11767861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492.

The product of its digits is 14112, while the sum is 37.

The square root of 11767861 is about 3430.4316054981. The cubic root of 11767861 is about 227.4569318303.

The spelling of 11767861 in words is "eleven million, seven hundred sixty-seven thousand, eight hundred sixty-one".