40002123 has 16 divisors (see below), whose sum is σ = 62254080. Its totient is φ = 22371456.

The previous prime is 40002103. The next prime is 40002133. The reversal of 40002123 is 32120004.

It is not a de Polignac number, because 40002123 - 2⁵ = 40002091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40002099 and 40002108.

It is not an unprimeable number, because it can be changed into a prime (40002103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19278 + ... + 21251.

It is an arithmetic number, because the mean of its divisors is an integer number (3890880).

Almost surely, 2^40002123 is an apocalyptic number.

40002123 is a deficient number, since it is larger than the sum of its proper divisors (22251957).

40002123 is a wasteful number, since it uses less digits than its factorization.

40002123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40586.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 40002123 is about 6324.7231559966. The cubic root of 40002123 is about 342.0012396932.

Adding to 40002123 its reverse (32120004), we get a palindrome (72122127).

The spelling of 40002123 in words is "forty million, two thousand, one hundred twenty-three".