40004131 has 2 divisors, whose sum is σ = 40004132. Its totient is φ = 40004130.

The previous prime is 40004119. The next prime is 40004143. The reversal of 40004131 is 13140004.

It is a balanced prime because it is at equal distance from previous prime (40004119) and next prime (40004143).

It is a cyclic number.

It is not a de Polignac number, because 40004131 - 2¹⁵ = 39971363 is a prime.

It is a super-2 number, since 2×40004131² = 3200660994130322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40004171) 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 as a sum of consecutive naturals, namely, 20002065 + 20002066.

It is an arithmetic number, because the mean of its divisors is an integer number (20002066).

Almost surely, 2^40004131 is an apocalyptic number.

40004131 is a deficient number, since it is larger than the sum of its proper divisors (1).

40004131 is an equidigital number, since it uses as much as digits as its factorization.

40004131 is an odious number, because the sum of its binary digits is odd.

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

The square root of 40004131 is about 6324.8818961306. The cubic root of 40004131 is about 342.0069621145.

Adding to 40004131 its reverse (13140004), we get a palindrome (53144135).

The spelling of 40004131 in words is "forty million, four thousand, one hundred thirty-one".