2281145 has 16 divisors (see below), whose sum is σ = 2965248. Its totient is φ = 1678080.

The previous prime is 2281127. The next prime is 2281151. The reversal of 2281145 is 5411822.

It is not a de Polignac number, because 2281145 - 2¹⁴ = 2264761 is a prime.

It is a super-2 number, since 2×2281145² = 10407245022050, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (640) is a multiple of the sum of its prime divisors (640).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2281145.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3710 + ... + 4280.

It is an arithmetic number, because the mean of its divisors is an integer number (185328).

2^2281145 is an apocalyptic number.

It is an amenable number.

2281145 is a deficient number, since it is larger than the sum of its proper divisors (684103).

2281145 is a wasteful number, since it uses less digits than its factorization.

2281145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640.

The product of its digits is 640, while the sum is 23.

The square root of 2281145 is about 1510.3459868520. The cubic root of 2281145 is about 131.6389159768.

Adding to 2281145 its reverse (5411822), we get a palindrome (7692967).

The spelling of 2281145 in words is "two million, two hundred eighty-one thousand, one hundred forty-five".