2750645 has 4 divisors (see below), whose sum is σ = 3300780. Its totient is φ = 2200512.

The previous prime is 2750641. The next prime is 2750653. The reversal of 2750645 is 5460572.

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 925444 + 1825201 = 962^2 + 1351^2 .

It is a cyclic number.

It is not a de Polignac number, because 2750645 - 2² = 2750641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2750641) 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, 275060 + ... + 275069.

It is an arithmetic number, because the mean of its divisors is an integer number (825195).

2^2750645 is an apocalyptic number.

It is an amenable number.

2750645 is a deficient number, since it is larger than the sum of its proper divisors (550135).

2750645 is an equidigital number, since it uses as much as digits as its factorization.

2750645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550134.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 2750645 is about 1658.5068585930. The cubic root of 2750645 is about 140.1129191030.

The spelling of 2750645 in words is "two million, seven hundred fifty thousand, six hundred forty-five".