40656001 has 4 divisors (see below), whose sum is σ = 41112900. Its totient is φ = 40199104.

The previous prime is 40655957. The next prime is 40656013. The reversal of 40656001 is 10065604.

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 8439025 + 32216976 = 2905^2 + 5676^2 .

It is a cyclic number.

It is not a de Polignac number, because 40656001 - 2⁷ = 40655873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40656071) 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 in 3 ways as a sum of consecutive naturals, for example, 228316 + ... + 228493.

It is an arithmetic number, because the mean of its divisors is an integer number (10278225).

Almost surely, 2^40656001 is an apocalyptic number.

It is an amenable number.

40656001 is a deficient number, since it is larger than the sum of its proper divisors (456899).

40656001 is an equidigital number, since it uses as much as digits as its factorization.

40656001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456898.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 40656001 is about 6376.2058467399. The cubic root of 40656001 is about 343.8546376326.

The spelling of 40656001 in words is "forty million, six hundred fifty-six thousand, one".