40143123 has 24 divisors (see below), whose sum is σ = 60622848. Its totient is φ = 25571952.

The previous prime is 40143107. The next prime is 40143127. The reversal of 40143123 is 32134104.

It is not a de Polignac number, because 40143123 - 2⁴ = 40143107 is a prime.

It is a super-2 number, since 2×40143123² = 3222940648386258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40143096 and 40143105.

It is not an unprimeable number, because it can be changed into a prime (40143127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17086 + ... + 19292.

It is an arithmetic number, because the mean of its divisors is an integer number (2525952).

Almost surely, 2^40143123 is an apocalyptic number.

40143123 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

40143123 is a deficient number, since it is larger than the sum of its proper divisors (20479725).

40143123 is a wasteful number, since it uses less digits than its factorization.

40143123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2303 (or 2300 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 40143123 is about 6335.8600836824. The cubic root of 40143123 is about 342.4025986197.

Adding to 40143123 its reverse (32134104), we get a palindrome (72277227).

The spelling of 40143123 in words is "forty million, one hundred forty-three thousand, one hundred twenty-three".