2171954 has 16 divisors (see below), whose sum is σ = 3483648. Its totient is φ = 1012032.

The previous prime is 2171951. The next prime is 2171963. The reversal of 2171954 is 4591712.

It is not an unprimeable number, because it can be changed into a prime (2171951) 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, 4067 + ... + 4569.

It is an arithmetic number, because the mean of its divisors is an integer number (217728).

2^2171954 is an apocalyptic number.

2171954 is a deficient number, since it is larger than the sum of its proper divisors (1311694).

2171954 is a wasteful number, since it uses less digits than its factorization.

2171954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649.

The product of its digits is 2520, while the sum is 29.

The square root of 2171954 is about 1473.7550678454. The cubic root of 2171954 is about 129.5041068449.

It can be divided in two parts, 2171 and 954, that added together give a 5-th power (3125 = 5⁵).

The spelling of 2171954 in words is "two million, one hundred seventy-one thousand, nine hundred fifty-four".