40001111 has 2 divisors, whose sum is σ = 40001112. Its totient is φ = 40001110.

The previous prime is 40001083. The next prime is 40001161. The reversal of 40001111 is 11110004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40001111 - 2¹⁴ = 39984727 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40001161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20000555 + 20000556.

It is an arithmetic number, because the mean of its divisors is an integer number (20000556).

Almost surely, 2^40001111 is an apocalyptic number.

40001111 is a deficient number, since it is larger than the sum of its proper divisors (1).

40001111 is an equidigital number, since it uses as much as digits as its factorization.

40001111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 40001111 is about 6324.6431519889. The cubic root of 40001111 is about 341.9983556115.

Adding to 40001111 its reverse (11110004), we get a palindrome (51111115).

The spelling of 40001111 in words is "forty million, one thousand, one hundred eleven".