40404571 has 2 divisors, whose sum is σ = 40404572. Its totient is φ = 40404570.

The previous prime is 40404547. The next prime is 40404587. The reversal of 40404571 is 17540404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40404571 - 2¹⁵ = 40371803 is a prime.

It is not a weakly prime, because it can be changed into another prime (40404521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20202285 + 20202286.

It is an arithmetic number, because the mean of its divisors is an integer number (20202286).

Almost surely, 2^40404571 is an apocalyptic number.

40404571 is a deficient number, since it is larger than the sum of its proper divisors (1).

40404571 is an equidigital number, since it uses as much as digits as its factorization.

40404571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 40404571 is about 6356.4589985305. The cubic root of 40404571 is about 343.1443348726.

Adding to 40404571 its reverse (17540404), we get a palindrome (57944975).

The spelling of 40404571 in words is "forty million, four hundred four thousand, five hundred seventy-one".