2650645 has 4 divisors (see below), whose sum is σ = 3180780. Its totient is φ = 2120512.

The previous prime is 2650639. The next prime is 2650663. The reversal of 2650645 is 5460562.

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 1999396 + 651249 = 1414^2 + 807^2 .

It is a cyclic number.

It is not a de Polignac number, because 2650645 - 2⁷ = 2650517 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265060 + ... + 265069.

It is an arithmetic number, because the mean of its divisors is an integer number (795195).

2^2650645 is an apocalyptic number.

It is an amenable number.

2650645 is a deficient number, since it is larger than the sum of its proper divisors (530135).

2650645 is an equidigital number, since it uses as much as digits as its factorization.

2650645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530134.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 2650645 is about 1628.0801577318. The cubic root of 2650645 is about 138.3939767334.

The spelling of 2650645 in words is "two million, six hundred fifty thousand, six hundred forty-five".