40026161 has 4 divisors (see below), whose sum is σ = 45744192. Its totient is φ = 34308132.

The previous prime is 40026157. The next prime is 40026167. The reversal of 40026161 is 16162004.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40026161 - 2² = 40026157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40026167) 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, 2859005 + ... + 2859018.

It is an arithmetic number, because the mean of its divisors is an integer number (11436048).

Almost surely, 2^40026161 is an apocalyptic number.

It is an amenable number.

40026161 is a deficient number, since it is larger than the sum of its proper divisors (5718031).

40026161 is an equidigital number, since it uses as much as digits as its factorization.

40026161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5718030.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 40026161 is about 6326.6231909289. The cubic root of 40026161 is about 342.0697308883.

Adding to 40026161 its reverse (16162004), we get a palindrome (56188165).

The spelling of 40026161 in words is "forty million, twenty-six thousand, one hundred sixty-one".