2543245 has 12 divisors (see below), whose sum is σ = 3223260. Its totient is φ = 1926144.

The previous prime is 2543239. The next prime is 2543249. The reversal of 2543245 is 5423452.

It can be written as a sum of positive squares in 2 ways, for example, as 346921 + 2196324 = 589^2 + 1482^2 .

It is not a de Polignac number, because 2543245 - 2³ = 2543237 is a prime.

It is a d-powerful number, because it can be written as 2⁵ + 5 + 4² + 3⁵ + 2¹⁹ + 4⁸ + 5⁹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1101 + ... + 2509.

It is an arithmetic number, because the mean of its divisors is an integer number (268605).

2^2543245 is an apocalyptic number.

It is an amenable number.

2543245 is a deficient number, since it is larger than the sum of its proper divisors (680015).

2543245 is a wasteful number, since it uses less digits than its factorization.

2543245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452 (or 1433 counting only the distinct ones).

The product of its digits is 4800, while the sum is 25.

The square root of 2543245 is about 1594.7554671485. The cubic root of 2543245 is about 136.4989780188.

Adding to 2543245 its reverse (5423452), we get a palindrome (7966697).

The spelling of 2543245 in words is "two million, five hundred forty-three thousand, two hundred forty-five".