2139912 has 32 divisors (see below), whose sum is σ = 5944800. Its totient is φ = 713232.

The previous prime is 2139911. The next prime is 2139919. The reversal of 2139912 is 2199312.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2139911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4738 + ... + 5169.

It is an arithmetic number, because the mean of its divisors is an integer number (185775).

2^2139912 is an apocalyptic number.

It is an amenable number.

2139912 is an abundant number, since it is smaller than the sum of its proper divisors (3804888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2139912 is a wasteful number, since it uses less digits than its factorization.

2139912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9922 (or 9912 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 2139912 is about 1462.8438057428. The cubic root of 2139912 is about 128.8641078442.

The spelling of 2139912 in words is "two million, one hundred thirty-nine thousand, nine hundred twelve".