2138471 has 8 divisors (see below), whose sum is σ = 2254560. Its totient is φ = 2024352.

The previous prime is 2138467. The next prime is 2138483. The reversal of 2138471 is 1748312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2138471 - 2² = 2138467 is a prime.

It is a super-3 number, since 3×2138471³ = 29338057140493983333, which contains 333 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2138471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2081 + ... + 2933.

It is an arithmetic number, because the mean of its divisors is an integer number (281820).

2^2138471 is an apocalyptic number.

2138471 is a deficient number, since it is larger than the sum of its proper divisors (116089).

2138471 is a wasteful number, since it uses less digits than its factorization.

2138471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985.

The product of its digits is 1344, while the sum is 26.

The square root of 2138471 is about 1462.3511890104. The cubic root of 2138471 is about 128.8351759883.

The spelling of 2138471 in words is "two million, one hundred thirty-eight thousand, four hundred seventy-one".