40812001 has 4 divisors (see below), whose sum is σ = 40840900. Its totient is φ = 40783104.

The previous prime is 40811987. The next prime is 40812029. The reversal of 40812001 is 10021804.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4511376 + 36300625 = 2124^2 + 6025^2 .

It is a cyclic number.

It is not a de Polignac number, because 40812001 - 2¹³ = 40803809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40812091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12216 + ... + 15193.

It is an arithmetic number, because the mean of its divisors is an integer number (10210225).

Almost surely, 2^40812001 is an apocalyptic number.

It is an amenable number.

40812001 is a deficient number, since it is larger than the sum of its proper divisors (28899).

40812001 is a wasteful number, since it uses less digits than its factorization.

40812001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28898.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 40812001 is about 6388.4271147130. The cubic root of 40812001 is about 344.2938746415.

Adding to 40812001 its reverse (10021804), we get a palindrome (50833805).

The spelling of 40812001 in words is "forty million, eight hundred twelve thousand, one".