2243745 has 48 divisors (see below), whose sum is σ = 4717440. Its totient is φ = 963072.

The previous prime is 2243743. The next prime is 2243753. The reversal of 2243745 is 5473422.

It is not a de Polignac number, because 2243745 - 2¹ = 2243743 is a prime.

It is a d-powerful number, because it can be written as 2 + 2¹³ + 4⁴ + 3⁹ + 7³ + 4⁹ + 5⁹ .

2243745 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2243741) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5146 + ... + 5564.

It is an arithmetic number, because the mean of its divisors is an integer number (98280).

2^2243745 is an apocalyptic number.

It is an amenable number.

2243745 is an abundant number, since it is smaller than the sum of its proper divisors (2473695).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2243745 is a wasteful number, since it uses less digits than its factorization.

2243745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 451 counting only the distinct ones).

The product of its digits is 6720, while the sum is 27.

The square root of 2243745 is about 1497.9135489073. The cubic root of 2243745 is about 130.9155293288.

It can be divided in two parts, 224 and 3745, that added together give a square (3969 = 63²).

The spelling of 2243745 in words is "two million, two hundred forty-three thousand, seven hundred forty-five".