2243457 has 10 divisors (see below), whose sum is σ = 3351458. Its totient is φ = 1495584.

The previous prime is 2243453. The next prime is 2243467. The reversal of 2243457 is 7543422.

It can be written as a sum of positive squares in only one way, i.e., 1245456 + 998001 = 1116^2 + 999^2 .

It is not a de Polignac number, because 2243457 - 2² = 2243453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 2³ + 2¹³ + 4⁴ + 3⁹ + 4⁹ + 5⁹ + 7² .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2243457.

It is not an unprimeable number, because it can be changed into a prime (2243453) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13768 + ... + 13929.

2^2243457 is an apocalyptic number.

2243457 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2243457 is a deficient number, since it is larger than the sum of its proper divisors (1108001).

2243457 is an equidigital number, since it uses as much as digits as its factorization.

2243457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27709 (or 27700 counting only the distinct ones).

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

The square root of 2243457 is about 1497.8174121034. The cubic root of 2243457 is about 130.9099277882.

Adding to 2243457 its reverse (7543422), we get a palindrome (9786879).

The spelling of 2243457 in words is "two million, two hundred forty-three thousand, four hundred fifty-seven".