4045023 has 12 divisors (see below), whose sum is σ = 5860920. Its totient is φ = 2688336.

The previous prime is 4045009. The next prime is 4045049. The reversal of 4045023 is 3205404.

It is a happy number.

It is not a de Polignac number, because 4045023 - 2⁶ = 4044959 is a prime.

It is a super-3 number, since 3×4045023³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an Ulam number.

4045023 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4044987 and 4045005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4045523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4140 + ... + 5022.

It is an arithmetic number, because the mean of its divisors is an integer number (488410).

Almost surely, 2^4045023 is an apocalyptic number.

4045023 is a deficient number, since it is larger than the sum of its proper divisors (1815897).

4045023 is a wasteful number, since it uses less digits than its factorization.

4045023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398 (or 1395 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 4045023 is about 2011.2242540304. The cubic root of 4045023 is about 159.3334641472. Note that the first 3 decimals are identical.

The spelling of 4045023 in words is "four million, forty-five thousand, twenty-three".