2171439 has 6 divisors (see below), whose sum is σ = 3136536. Its totient is φ = 1447620.

The previous prime is 2171437. The next prime is 2171441. The reversal of 2171439 is 9341712.

It is an interprime number because it is at equal distance from previous prime (2171437) and next prime (2171441).

It is not a de Polignac number, because 2171439 - 2¹ = 2171437 is a prime.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 120627 + ... + 120644.

It is an arithmetic number, because the mean of its divisors is an integer number (522756).

2^2171439 is an apocalyptic number.

2171439 is a deficient number, since it is larger than the sum of its proper divisors (965097).

2171439 is a wasteful number, since it uses less digits than its factorization.

2171439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241277 (or 241274 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 2171439 is about 1473.5803337450. The cubic root of 2171439 is about 129.4938703041.

The spelling of 2171439 in words is "two million, one hundred seventy-one thousand, four hundred thirty-nine".