2173541 has 4 divisors (see below), whose sum is σ = 2176512. Its totient is φ = 2170572.

The previous prime is 2173531. The next prime is 2173553. The reversal of 2173541 is 1453712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2173541 - 2¹⁴ = 2157157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476 + ... + 2138.

It is an arithmetic number, because the mean of its divisors is an integer number (544128).

2^2173541 is an apocalyptic number.

It is an amenable number.

2173541 is a deficient number, since it is larger than the sum of its proper divisors (2971).

2173541 is a wasteful number, since it uses less digits than its factorization.

2173541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2970.

The product of its digits is 840, while the sum is 23.

The square root of 2173541 is about 1474.2933900686. The cubic root of 2173541 is about 129.5356411194.

The spelling of 2173541 in words is "two million, one hundred seventy-three thousand, five hundred forty-one".