2121471 has 20 divisors (see below), whose sum is σ = 3458664. Its totient is φ = 1285200.

The previous prime is 2121461. The next prime is 2121479. The reversal of 2121471 is 1741212.

It is not a de Polignac number, because 2121471 - 2¹⁵ = 2088703 is a prime.

It is a super-3 number, since 3×2121471³ = 28643926657235310333, which contains 333 as substring.

2121471 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121479) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 300 + ... + 2081.

2^2121471 is an apocalyptic number.

2121471 is a deficient number, since it is larger than the sum of its proper divisors (1337193).

2121471 is a wasteful number, since it uses less digits than its factorization.

2121471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2404 (or 2395 counting only the distinct ones).

The product of its digits is 112, while the sum is 18.

The square root of 2121471 is about 1456.5270337347. The cubic root of 2121471 is about 128.4928710585.

Adding to 2121471 its reverse (1741212), we get a palindrome (3862683).

It can be divided in two parts, 2121 and 471, that multiplied together give a triangular number (998991 = T₁₄₁₃).

The spelling of 2121471 in words is "two million, one hundred twenty-one thousand, four hundred seventy-one".