2172481 has 8 divisors (see below), whose sum is σ = 2350080. Its totient is φ = 2000448.

The previous prime is 2172473. The next prime is 2172491. The reversal of 2172481 is 1842712.

It is a happy number.

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 2172481 - 2³ = 2172473 is a prime.

It is a super-2 number, since 2×2172481² = 9439347390722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 561 + ... + 2158.

It is an arithmetic number, because the mean of its divisors is an integer number (293760).

2^2172481 is an apocalyptic number.

It is an amenable number.

2172481 is a deficient number, since it is larger than the sum of its proper divisors (177599).

2172481 is a wasteful number, since it uses less digits than its factorization.

2172481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2783.

The product of its digits is 896, while the sum is 25.

The square root of 2172481 is about 1473.9338519757. The cubic root of 2172481 is about 129.5145802320.

The spelling of 2172481 in words is "two million, one hundred seventy-two thousand, four hundred eighty-one".