2087645 has 12 divisors (see below), whose sum is σ = 2914524. Its totient is φ = 1431360.

The previous prime is 2087627. The next prime is 2087669. The reversal of 2087645 is 5467802.

It can be written as a sum of positive squares in 2 ways, for example, as 879844 + 1207801 = 938^2 + 1099^2 .

It is not a de Polignac number, because 2087645 - 2⁸ = 2087389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4016 + ... + 4505.

It is an arithmetic number, because the mean of its divisors is an integer number (242877).

2^2087645 is an apocalyptic number.

It is an amenable number.

2087645 is a deficient number, since it is larger than the sum of its proper divisors (826879).

2087645 is an equidigital number, since it uses as much as digits as its factorization.

2087645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8540 (or 8533 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 2087645 is about 1444.8685061278. The cubic root of 2087645 is about 127.8062865745.

The spelling of 2087645 in words is "two million, eighty-seven thousand, six hundred forty-five".