2545865 has 8 divisors (see below), whose sum is σ = 3491520. Its totient is φ = 1745712.

The previous prime is 2545861. The next prime is 2545883. The reversal of 2545865 is 5685452.

2545865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2545865 - 2² = 2545861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 72739 = 2545865 / (2 + 5 + 4 + 5 + 8 + 6 + 5).

It is not an unprimeable number, because it can be changed into a prime (2545861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36335 + ... + 36404.

It is an arithmetic number, because the mean of its divisors is an integer number (436440).

2^2545865 is an apocalyptic number.

It is an amenable number.

2545865 is a deficient number, since it is larger than the sum of its proper divisors (945655).

2545865 is an equidigital number, since it uses as much as digits as its factorization.

2545865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72751.

The product of its digits is 48000, while the sum is 35.

The square root of 2545865 is about 1595.5766982505. The cubic root of 2545865 is about 136.5458347688.

The spelling of 2545865 in words is "two million, five hundred forty-five thousand, eight hundred sixty-five".