2139924 has 12 divisors (see below), whose sum is σ = 4993184. Its totient is φ = 713304.

The previous prime is 2139923. The next prime is 2139931. The reversal of 2139924 is 4299312.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 2139891 and 2139900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89152 + ... + 89175.

2^2139924 is an apocalyptic number.

It is an amenable number.

2139924 is an abundant number, since it is smaller than the sum of its proper divisors (2853260).

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

2139924 is a wasteful number, since it uses less digits than its factorization.

2139924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178334 (or 178332 counting only the distinct ones).

The product of its digits is 3888, while the sum is 30.

The square root of 2139924 is about 1462.8479073369. The cubic root of 2139924 is about 128.8643487211.

The spelling of 2139924 in words is "two million, one hundred thirty-nine thousand, nine hundred twenty-four".