2139423 has 16 divisors (see below), whose sum is σ = 3351936. Its totient is φ = 1196640.

The previous prime is 2139409. The next prime is 2139427. The reversal of 2139423 is 3249312.

It is not a de Polignac number, because 2139423 - 2⁴ = 2139407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2139393 and 2139402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2065 + ... + 2922.

It is an arithmetic number, because the mean of its divisors is an integer number (209496).

2^2139423 is an apocalyptic number.

2139423 is a deficient number, since it is larger than the sum of its proper divisors (1212513).

2139423 is a wasteful number, since it uses less digits than its factorization.

2139423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5014.

The product of its digits is 1296, while the sum is 24.

The square root of 2139423 is about 1462.6766559975. The cubic root of 2139423 is about 128.8542913425.

The spelling of 2139423 in words is "two million, one hundred thirty-nine thousand, four hundred twenty-three".