11729861 has 12 divisors (see below), whose sum is σ = 13886796. Its totient is φ = 9841920.

The previous prime is 11729857. The next prime is 11729899. The reversal of 11729861 is 16892711.

11729861 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2579236 + 9150625 = 1606^2 + 3025^2 .

It is not a de Polignac number, because 11729861 - 2² = 11729857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11729561) 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, 2156 + ... + 5301.

It is an arithmetic number, because the mean of its divisors is an integer number (1157233).

Almost surely, 2^11729861 is an apocalyptic number.

11729861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11729861 is a deficient number, since it is larger than the sum of its proper divisors (2156935).

11729861 is a wasteful number, since it uses less digits than its factorization.

11729861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7492 (or 7481 counting only the distinct ones).

The product of its digits is 6048, while the sum is 35.

The square root of 11729861 is about 3424.8884653372. Note that the first 3 decimals coincide. The cubic root of 11729861 is about 227.2118381904.

The spelling of 11729861 in words is "eleven million, seven hundred twenty-nine thousand, eight hundred sixty-one".