2172471 has 8 divisors (see below), whose sum is σ = 3310464. Its totient is φ = 1241400.

The previous prime is 2172461. The next prime is 2172473. The reversal of 2172471 is 1742712.

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

It is not a de Polignac number, because 2172471 - 2⁷ = 2172343 is a prime.

It is a super-3 number, since 3×2172471³ = 30759779519437329333, which contains 333 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172473) 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, 51705 + ... + 51746.

It is an arithmetic number, because the mean of its divisors is an integer number (413808).

2^2172471 is an apocalyptic number.

2172471 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2172471 is a deficient number, since it is larger than the sum of its proper divisors (1137993).

2172471 is a wasteful number, since it uses less digits than its factorization.

2172471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103461.

The product of its digits is 784, while the sum is 24.

The square root of 2172471 is about 1473.9304596893. The cubic root of 2172471 is about 129.5143815118.

The spelling of 2172471 in words is "two million, one hundred seventy-two thousand, four hundred seventy-one".