40126 has 4 divisors (see below), whose sum is σ = 60192. Its totient is φ = 20062.

The previous prime is 40123. The next prime is 40127. The reversal of 40126 is 62104.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×40126² = 3220191752, which contains 22 as substring.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10030 + ... + 10033.

It is an arithmetic number, because the mean of its divisors is an integer number (15048).

2⁴⁰¹²⁶ is an apocalyptic number.

40126 is a deficient number, since it is larger than the sum of its proper divisors (20066).

40126 is a wasteful number, since it uses less digits than its factorization.

40126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20065.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 40126 is about 200.3147523274. The cubic root of 40126 is about 34.2353907893.

The spelling of 40126 in words is "forty thousand, one hundred twenty-six".