2249869 has 4 divisors (see below), whose sum is σ = 2270620. Its totient is φ = 2229120.

The previous prime is 2249867. The next prime is 2249911. The reversal of 2249869 is 9689422.

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 927369 + 1322500 = 963^2 + 1150^2 .

It is a cyclic number.

It is not a de Polignac number, because 2249869 - 2¹ = 2249867 is a prime.

It is a super-2 number, since 2×2249869² = 10123821034322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2249861) 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, 10212 + ... + 10429.

It is an arithmetic number, because the mean of its divisors is an integer number (567655).

2^2249869 is an apocalyptic number.

It is an amenable number.

2249869 is a deficient number, since it is larger than the sum of its proper divisors (20751).

2249869 is a wasteful number, since it uses less digits than its factorization.

2249869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20750.

The product of its digits is 62208, while the sum is 40.

The square root of 2249869 is about 1499.9563326977. The cubic root of 2249869 is about 131.0345265713.

The spelling of 2249869 in words is "two million, two hundred forty-nine thousand, eight hundred sixty-nine".