2140471 has 4 divisors (see below), whose sum is σ = 2144200. Its totient is φ = 2136744.

The previous prime is 2140459. The next prime is 2140477. The reversal of 2140471 is 1740412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2140471 - 2⁹ = 2139959 is a prime.

It is a super-3 number, since 3×2140471³ = 29420449197371121333, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140477) 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, 801 + ... + 2218.

It is an arithmetic number, because the mean of its divisors is an integer number (536050).

2^2140471 is an apocalyptic number.

2140471 is a deficient number, since it is larger than the sum of its proper divisors (3729).

2140471 is an equidigital number, since it uses as much as digits as its factorization.

2140471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3728.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 2140471 is about 1463.0348594617. The cubic root of 2140471 is about 128.8753277393.

Adding to 2140471 its reverse (1740412), we get a palindrome (3880883).

The spelling of 2140471 in words is "two million, one hundred forty thousand, four hundred seventy-one".