2645859 has 4 divisors (see below), whose sum is σ = 3527816. Its totient is φ = 1763904.

The previous prime is 2645849. The next prime is 2645861. The reversal of 2645859 is 9585462.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2645859 - 2⁴ = 2645843 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 6⁵ + 4⁷ + 5³ + 8⁷ + 5³ + 9 .

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2645809) 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, 440974 + ... + 440979.

It is an arithmetic number, because the mean of its divisors is an integer number (881954).

2^2645859 is an apocalyptic number.

2645859 is a deficient number, since it is larger than the sum of its proper divisors (881957).

2645859 is an equidigital number, since it uses as much as digits as its factorization.

2645859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881956.

The product of its digits is 86400, while the sum is 39.

The square root of 2645859 is about 1626.6096643018. The cubic root of 2645859 is about 138.3106319097.

The spelling of 2645859 in words is "two million, six hundred forty-five thousand, eight hundred fifty-nine".