2065657 has 4 divisors (see below), whose sum is σ = 2253456. Its totient is φ = 1877860.

The previous prime is 2065639. The next prime is 2065663. The reversal of 2065657 is 7565602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2065657 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 0 + 6⁵ + 5⁷ + 6⁵ + 5⁹ + 7⁵ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2065627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93883 + ... + 93904.

It is an arithmetic number, because the mean of its divisors is an integer number (563364).

2^2065657 is an apocalyptic number.

It is an amenable number.

2065657 is a deficient number, since it is larger than the sum of its proper divisors (187799).

2065657 is a wasteful number, since it uses less digits than its factorization.

2065657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187798.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 2065657 is about 1437.2393676768. The cubic root of 2065657 is about 127.3559978722.

Subtracting 2065657 from its reverse (7565602), we obtain a palindrome (5499945).

The spelling of 2065657 in words is "two million, sixty-five thousand, six hundred fifty-seven".