2129686 has 16 divisors (see below), whose sum is σ = 3478608. Its totient is φ = 972000.

The previous prime is 2129671. The next prime is 2129689. The reversal of 2129686 is 6869212.

It is a happy number.

2129686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129689) 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 7 ways as a sum of consecutive naturals, for example, 2221 + ... + 3031.

It is an arithmetic number, because the mean of its divisors is an integer number (217413).

2^2129686 is an apocalyptic number.

2129686 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2129686 is a deficient number, since it is larger than the sum of its proper divisors (1348922).

2129686 is a wasteful number, since it uses less digits than its factorization.

2129686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927.

The product of its digits is 10368, while the sum is 34.

The square root of 2129686 is about 1459.3443733403. The cubic root of 2129686 is about 128.6585123143.

The spelling of 2129686 in words is "two million, one hundred twenty-nine thousand, six hundred eighty-six".