2455865 has 8 divisors (see below), whose sum is σ = 3048840. Its totient is φ = 1896832.

The previous prime is 2455847. The next prime is 2455889. The reversal of 2455865 is 5685542.

It can be written as a sum of positive squares in 4 ways, for example, as 157609 + 2298256 = 397^2 + 1516^2 .

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

It is not a de Polignac number, because 2455865 - 2¹⁰ = 2454841 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8324 + ... + 8613.

It is an arithmetic number, because the mean of its divisors is an integer number (381105).

2^2455865 is an apocalyptic number.

It is an amenable number.

2455865 is a deficient number, since it is larger than the sum of its proper divisors (592975).

2455865 is a wasteful number, since it uses less digits than its factorization.

2455865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16971.

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

The square root of 2455865 is about 1567.1199698811. The cubic root of 2455865 is about 134.9174621216.

The spelling of 2455865 in words is "two million, four hundred fifty-five thousand, eight hundred sixty-five".