2171420 has 12 divisors (see below), whose sum is σ = 4560024. Its totient is φ = 868560.

The previous prime is 2171387. The next prime is 2171431. The reversal of 2171420 is 241712.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 54266 + ... + 54305.

It is an arithmetic number, because the mean of its divisors is an integer number (380002).

2^2171420 is an apocalyptic number.

2171420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2171420 is an abundant number, since it is smaller than the sum of its proper divisors (2388604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2171420 is a wasteful number, since it uses less digits than its factorization.

2171420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108580 (or 108578 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 2171420 is about 1473.5738868479. The cubic root of 2171420 is about 129.4934926144.

The spelling of 2171420 in words is "two million, one hundred seventy-one thousand, four hundred twenty".