2649785 has 4 divisors (see below), whose sum is σ = 3179748. Its totient is φ = 2119824.

The previous prime is 2649781. The next prime is 2649799. The reversal of 2649785 is 5879462.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1752976 + 896809 = 1324^2 + 947^2 .

It is a cyclic number.

It is not a de Polignac number, because 2649785 - 2² = 2649781 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 6² + 4⁶ + 9⁶ + 7⁵ + 8⁷ + 5³ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2649781) 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, 264974 + ... + 264983.

It is an arithmetic number, because the mean of its divisors is an integer number (794937).

2^2649785 is an apocalyptic number.

It is an amenable number.

2649785 is a deficient number, since it is larger than the sum of its proper divisors (529963).

2649785 is an equidigital number, since it uses as much as digits as its factorization.

2649785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529962.

The product of its digits is 120960, while the sum is 41.

The square root of 2649785 is about 1627.8160215454. The cubic root of 2649785 is about 138.3790078366.

The spelling of 2649785 in words is "two million, six hundred forty-nine thousand, seven hundred eighty-five".