4006123 has 4 divisors (see below), whose sum is σ = 4370328. Its totient is φ = 3641920.

The previous prime is 4006109. The next prime is 4006129. The reversal of 4006123 is 3216004.

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 4006123 - 2⁵ = 4006091 is a prime.

It is a super-2 number, since 2×4006123² = 32098042982258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4006097 and 4006106.

It is not an unprimeable number, because it can be changed into a prime (4006129) 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, 182086 + ... + 182107.

It is an arithmetic number, because the mean of its divisors is an integer number (1092582).

Almost surely, 2^4006123 is an apocalyptic number.

4006123 is a deficient number, since it is larger than the sum of its proper divisors (364205).

4006123 is a wasteful number, since it uses less digits than its factorization.

4006123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364204.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 4006123 is about 2001.5301646490. The cubic root of 4006123 is about 158.8210610418.

It can be divided in two parts, 40061 and 23, that multiplied together give a triangular number (921403 = T₁₃₅₇).

The spelling of 4006123 in words is "four million, six thousand, one hundred twenty-three".