2745623 has 4 divisors (see below), whose sum is σ = 2764200. Its totient is φ = 2727048.

The previous prime is 2745607. The next prime is 2745637. The reversal of 2745623 is 3265472.

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

It is a cyclic number.

It is not a de Polignac number, because 2745623 - 2⁴ = 2745607 is a prime.

It is a d-powerful number, because it can be written as 2¹⁰ + 7² + 4 + 5⁶ + 6⁸ + 2²⁰ + 3⁶ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2745643) 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, 9065 + ... + 9362.

It is an arithmetic number, because the mean of its divisors is an integer number (691050).

2^2745623 is an apocalyptic number.

2745623 is a deficient number, since it is larger than the sum of its proper divisors (18577).

2745623 is a wasteful number, since it uses less digits than its factorization.

2745623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18576.

The product of its digits is 10080, while the sum is 29.

The square root of 2745623 is about 1656.9921544775. The cubic root of 2745623 is about 140.0275966007.

It can be divided in two parts, 274562 and 3, that multiplied together give a triangular number (823686 = T₁₂₈₃).

The spelling of 2745623 in words is "two million, seven hundred forty-five thousand, six hundred twenty-three".