2172941 has 4 divisors (see below), whose sum is σ = 2247900. Its totient is φ = 2097984.

The previous prime is 2172917. The next prime is 2172943. The reversal of 2172941 is 1492712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1755625 + 417316 = 1325^2 + 646^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2172941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2172941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172943) 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 3 ways as a sum of consecutive naturals, for example, 37436 + ... + 37493.

It is an arithmetic number, because the mean of its divisors is an integer number (561975).

2^2172941 is an apocalyptic number.

It is an amenable number.

2172941 is a deficient number, since it is larger than the sum of its proper divisors (74959).

2172941 is an equidigital number, since it uses as much as digits as its factorization.

2172941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74958.

The product of its digits is 1008, while the sum is 26.

The square root of 2172941 is about 1474.0898887110. The cubic root of 2172941 is about 129.5237207036.

It can be divided in two parts, 2172 and 941, that added together give a palindrome (3113).

The spelling of 2172941 in words is "two million, one hundred seventy-two thousand, nine hundred forty-one".