4045623 has 4 divisors (see below), whose sum is σ = 5394168. Its totient is φ = 2697080.

The previous prime is 4045603. The next prime is 4045633. The reversal of 4045623 is 3265404.

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 4045623 - 2¹⁴ = 4029239 is a prime.

It is a D-number.

4045623 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4045593 and 4045602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4045603) 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, 674268 + ... + 674273.

It is an arithmetic number, because the mean of its divisors is an integer number (1348542).

Almost surely, 2^4045623 is an apocalyptic number.

4045623 is a deficient number, since it is larger than the sum of its proper divisors (1348545).

4045623 is a wasteful number, since it uses less digits than its factorization.

4045623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348544.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 4045623 is about 2011.3734113784. The cubic root of 4045623 is about 159.3413417581.

The spelling of 4045623 in words is "four million, forty-five thousand, six hundred twenty-three".