2251345 has 8 divisors (see below), whose sum is σ = 2716776. Its totient is φ = 1790976.

The previous prime is 2251343. The next prime is 2251349. The reversal of 2251345 is 5431522.

It can be written as a sum of positive squares in 4 ways, for example, as 25281 + 2226064 = 159^2 + 1492^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2251345 - 2¹ = 2251343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2251343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202 + ... + 2131.

It is an arithmetic number, because the mean of its divisors is an integer number (339597).

2^2251345 is an apocalyptic number.

It is an amenable number.

2251345 is a deficient number, since it is larger than the sum of its proper divisors (465431).

2251345 is a wasteful number, since it uses less digits than its factorization.

2251345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2531.

The product of its digits is 1200, while the sum is 22.

The square root of 2251345 is about 1500.4482663524. The cubic root of 2251345 is about 131.0631748589.

Adding to 2251345 its reverse (5431522), we get a palindrome (7682867).

The spelling of 2251345 in words is "two million, two hundred fifty-one thousand, three hundred forty-five".