40404061 has 4 divisors (see below), whose sum is σ = 40445824. Its totient is φ = 40362300.

The previous prime is 40404043. The next prime is 40404097. The reversal of 40404061 is 16040404.

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 40404061 - 2⁷ = 40403933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40404361) 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 3 ways as a sum of consecutive naturals, for example, 19395 + ... + 21376.

It is an arithmetic number, because the mean of its divisors is an integer number (10111456).

Almost surely, 2^40404061 is an apocalyptic number.

It is an amenable number.

40404061 is a deficient number, since it is larger than the sum of its proper divisors (41763).

40404061 is an equidigital number, since it uses as much as digits as its factorization.

40404061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41762.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 40404061 is about 6356.4188817289. The cubic root of 40404061 is about 343.1428911057.

Adding to 40404061 its reverse (16040404), we get a palindrome (56444465).

The spelling of 40404061 in words is "forty million, four hundred four thousand, sixty-one".