2149217 has 4 divisors (see below), whose sum is σ = 2456256. Its totient is φ = 1842180.

The previous prime is 2149211. The next prime is 2149237. The reversal of 2149217 is 7129412.

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.

It is a cyclic number.

It is not a de Polignac number, because 2149217 - 2¹⁶ = 2083681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2149211) 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, 153509 + ... + 153522.

It is an arithmetic number, because the mean of its divisors is an integer number (614064).

2^2149217 is an apocalyptic number.

It is an amenable number.

2149217 is a deficient number, since it is larger than the sum of its proper divisors (307039).

2149217 is an equidigital number, since it uses as much as digits as its factorization.

2149217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307038.

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

The square root of 2149217 is about 1466.0208047637. The cubic root of 2149217 is about 129.0506181179.

The spelling of 2149217 in words is "two million, one hundred forty-nine thousand, two hundred seventeen".