40256401 has 4 divisors (see below), whose sum is σ = 40916404. Its totient is φ = 39596400.

The previous prime is 40256387. The next prime is 40256413. The reversal of 40256401 is 10465204.

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 7182400 + 33074001 = 2680^2 + 5751^2 .

It is a cyclic number.

It is not a de Polignac number, because 40256401 - 2⁵ = 40256369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40256101) 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, 329910 + ... + 330031.

It is an arithmetic number, because the mean of its divisors is an integer number (10229101).

Almost surely, 2^40256401 is an apocalyptic number.

It is an amenable number.

40256401 is a deficient number, since it is larger than the sum of its proper divisors (660003).

40256401 is an equidigital number, since it uses as much as digits as its factorization.

40256401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660002.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 40256401 is about 6344.7932196408. The cubic root of 40256401 is about 342.7243661050.

The spelling of 40256401 in words is "forty million, two hundred fifty-six thousand, four hundred one".