2249605 has 4 divisors (see below), whose sum is σ = 2699532. Its totient is φ = 1799680.

The previous prime is 2249603. The next prime is 2249609. The reversal of 2249605 is 5069422.

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 1520289 + 729316 = 1233^2 + 854^2 .

It is not a de Polignac number, because 2249605 - 2¹ = 2249603 is a prime.

It is a Duffinian number.

2249605 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2249603) 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, 224956 + ... + 224965.

It is an arithmetic number, because the mean of its divisors is an integer number (674883).

2^2249605 is an apocalyptic number.

It is an amenable number.

2249605 is a deficient number, since it is larger than the sum of its proper divisors (449927).

2249605 is an equidigital number, since it uses as much as digits as its factorization.

2249605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449926.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 2249605 is about 1499.8683275541. The cubic root of 2249605 is about 131.0294011665.

The spelling of 2249605 in words is "two million, two hundred forty-nine thousand, six hundred five".