2645871 has 8 divisors (see below), whose sum is σ = 3537024. Its totient is φ = 1759320.

The previous prime is 2645861. The next prime is 2645879. The reversal of 2645871 is 1785462.

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

It is not a de Polignac number, because 2645871 - 2⁷ = 2645743 is a prime.

It is a super-3 number, since 3×2645871³ = 55568318276406333933, which contains 333 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556 + ... + 2366.

It is an arithmetic number, because the mean of its divisors is an integer number (442128).

2^2645871 is an apocalyptic number.

2645871 is a deficient number, since it is larger than the sum of its proper divisors (891153).

2645871 is a wasteful number, since it uses less digits than its factorization.

2645871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2301.

The product of its digits is 13440, while the sum is 33.

The square root of 2645871 is about 1626.6133529515. The cubic root of 2645871 is about 138.3108410069.

The spelling of 2645871 in words is "two million, six hundred forty-five thousand, eight hundred seventy-one".