2458865 has 4 divisors (see below), whose sum is σ = 2950644. Its totient is φ = 1967088.

The previous prime is 2458843. The next prime is 2458867. The reversal of 2458865 is 5688542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5688542 = 2 ⋅2844271.

It can be written as a sum of positive squares in 2 ways, for example, as 719104 + 1739761 = 848^2 + 1319^2 .

It is a cyclic number.

It is not a de Polignac number, because 2458865 - 2⁸ = 2458609 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2458867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245882 + ... + 245891.

It is an arithmetic number, because the mean of its divisors is an integer number (737661).

2^2458865 is an apocalyptic number.

It is an amenable number.

2458865 is a deficient number, since it is larger than the sum of its proper divisors (491779).

2458865 is an equidigital number, since it uses as much as digits as its factorization.

2458865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491778.

The product of its digits is 76800, while the sum is 38.

The square root of 2458865 is about 1568.0768476066. The cubic root of 2458865 is about 134.9723766070.

The spelling of 2458865 in words is "two million, four hundred fifty-eight thousand, eight hundred sixty-five".