2171841 has 8 divisors (see below), whose sum is σ = 3309504. Its totient is φ = 1241040.

The previous prime is 2171837. The next prime is 2171843. The reversal of 2171841 is 1481712.

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

It is not a de Polignac number, because 2171841 - 2² = 2171837 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2171843) 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, 51690 + ... + 51731.

It is an arithmetic number, because the mean of its divisors is an integer number (413688).

2^2171841 is an apocalyptic number.

2171841 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2171841 is a deficient number, since it is larger than the sum of its proper divisors (1137663).

2171841 is a wasteful number, since it uses less digits than its factorization.

2171841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103431.

The product of its digits is 448, while the sum is 24.

The square root of 2171841 is about 1473.7167299044. The cubic root of 2171841 is about 129.5018609076.

The spelling of 2171841 in words is "two million, one hundred seventy-one thousand, eight hundred forty-one".