40010123 has 2 divisors, whose sum is σ = 40010124. Its totient is φ = 40010122.

The previous prime is 40010101. The next prime is 40010147. The reversal of 40010123 is 32101004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40010123 - 2²⁰ = 38961547 is a prime.

It is not a weakly prime, because it can be changed into another prime (40010183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20005061 + 20005062.

It is an arithmetic number, because the mean of its divisors is an integer number (20005062).

Almost surely, 2^40010123 is an apocalyptic number.

40010123 is a deficient number, since it is larger than the sum of its proper divisors (1).

40010123 is an equidigital number, since it uses as much as digits as its factorization.

40010123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 40010123 is about 6325.3555631284. The cubic root of 40010123 is about 342.0240370461.

Adding to 40010123 its reverse (32101004), we get a palindrome (72111127).

The spelling of 40010123 in words is "forty million, ten thousand, one hundred twenty-three".