2545216 has 14 divisors (see below), whose sum is σ = 5050790. Its totient is φ = 1272576.

The previous prime is 2545211. The next prime is 2545237. The reversal of 2545216 is 6125452.

It can be written as a sum of positive squares in only one way, i.e., 1742400 + 802816 = 1320^2 + 896^2 .

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (2545211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19821 + ... + 19948.

2^2545216 is an apocalyptic number.

It is an amenable number.

2545216 is a deficient number, since it is larger than the sum of its proper divisors (2505574).

2545216 is an equidigital number, since it uses as much as digits as its factorization.

2545216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39781 (or 39771 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 2545216 is about 1595.3733105452. The cubic root of 2545216 is about 136.5342308833.

The spelling of 2545216 in words is "two million, five hundred forty-five thousand, two hundred sixteen".