2171490 has 16 divisors (see below), whose sum is σ = 5211648. Its totient is φ = 579056.

The previous prime is 2171441. The next prime is 2171497. The reversal of 2171490 is 941712.

It is a self number, because there is not a number n which added to its sum of digits gives 2171490.

It is not an unprimeable number, because it can be changed into a prime (2171497) 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, 36162 + ... + 36221.

It is an arithmetic number, because the mean of its divisors is an integer number (325728).

2^2171490 is an apocalyptic number.

2171490 is an abundant number, since it is smaller than the sum of its proper divisors (3040158).

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

2171490 is a wasteful number, since it uses less digits than its factorization.

2171490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72393.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 2171490 is about 1473.5976384346. The cubic root of 2171490 is about 129.4948840920.

The spelling of 2171490 in words is "two million, one hundred seventy-one thousand, four hundred ninety".