2171430 has 48 divisors (see below), whose sum is σ = 5896800. Its totient is φ = 553344.

The previous prime is 2171387. The next prime is 2171431. The reversal of 2171430 is 341712.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171431) 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 23 ways as a sum of consecutive naturals, for example, 1546 + ... + 2594.

It is an arithmetic number, because the mean of its divisors is an integer number (122850).

2^2171430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2171430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2948400).

2171430 is an abundant number, since it is smaller than the sum of its proper divisors (3725370).

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

2171430 is a wasteful number, since it uses less digits than its factorization.

2171430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085 (or 1082 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 2171430 is about 1473.5772799551. The cubic root of 2171430 is about 129.4936913987.

It can be divided in two parts, 2171 and 430, that added together give a square (2601 = 51²).

The spelling of 2171430 in words is "two million, one hundred seventy-one thousand, four hundred thirty".