40505001 has 12 divisors (see below), whose sum is σ = 56459088. Its totient is φ = 25828264.

The previous prime is 40504993. The next prime is 40505021. The reversal of 40505001 is 10050504.

It is not a de Polignac number, because 40505001 - 2³ = 40504993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40505021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11175 + ... + 14348.

It is an arithmetic number, because the mean of its divisors is an integer number (4704924).

Almost surely, 2^40505001 is an apocalyptic number.

It is an amenable number.

40505001 is a deficient number, since it is larger than the sum of its proper divisors (15954087).

40505001 is a wasteful number, since it uses less digits than its factorization.

40505001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25572 (or 25549 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 40505001 is about 6364.3539342183. The cubic root of 40505001 is about 343.4284072853.

Adding to 40505001 its reverse (10050504), we get a palindrome (50555505).

The spelling of 40505001 in words is "forty million, five hundred five thousand, one".