2180249 has 4 divisors (see below), whose sum is σ = 2255460. Its totient is φ = 2105040.

The previous prime is 2180221. The next prime is 2180251. The reversal of 2180249 is 9420812.

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 1243225 + 937024 = 1115^2 + 968^2 .

It is a cyclic number.

It is not a de Polignac number, because 2180249 - 2⁸ = 2179993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2180219) 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, 37562 + ... + 37619.

It is an arithmetic number, because the mean of its divisors is an integer number (563865).

2^2180249 is an apocalyptic number.

2180249 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2180249 is a deficient number, since it is larger than the sum of its proper divisors (75211).

2180249 is an equidigital number, since it uses as much as digits as its factorization.

2180249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75210.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 2180249 is about 1476.5666256556. The cubic root of 2180249 is about 129.6687622515.

The spelling of 2180249 in words is "two million, one hundred eighty thousand, two hundred forty-nine".