2249945 has 4 divisors (see below), whose sum is σ = 2699940. Its totient is φ = 1799952.

The previous prime is 2249941. The next prime is 2249953. The reversal of 2249945 is 5499422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5499422 = 2 ⋅2749711.

It can be written as a sum of positive squares in 2 ways, for example, as 1708249 + 541696 = 1307^2 + 736^2 .

It is a cyclic number.

It is not a de Polignac number, because 2249945 - 2² = 2249941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2249941) 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, 224990 + ... + 224999.

It is an arithmetic number, because the mean of its divisors is an integer number (674985).

2^2249945 is an apocalyptic number.

It is an amenable number.

2249945 is a deficient number, since it is larger than the sum of its proper divisors (449995).

2249945 is an equidigital number, since it uses as much as digits as its factorization.

2249945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449994.

The product of its digits is 25920, while the sum is 35.

The square root of 2249945 is about 1499.9816665546. The cubic root of 2249945 is about 131.0360019923.

The spelling of 2249945 in words is "two million, two hundred forty-nine thousand, nine hundred forty-five".