400201441 has 4 divisors (see below), whose sum is σ = 401348500. Its totient is φ = 399054384.

The previous prime is 400201423. The next prime is 400201447. The reversal of 400201441 is 144102004.

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 202208400 + 197993041 = 14220^2 + 14071^2 .

It is a cyclic number.

It is not a de Polignac number, because 400201441 - 2⁵ = 400201409 is a prime.

It is a super-2 number, since 2×400201441² = 320322386756952962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400201447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573006 + ... + 573703.

It is an arithmetic number, because the mean of its divisors is an integer number (100337125).

Almost surely, 2^400201441 is an apocalyptic number.

It is an amenable number.

400201441 is a deficient number, since it is larger than the sum of its proper divisors (1147059).

400201441 is a wasteful number, since it uses less digits than its factorization.

400201441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147058.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 400201441 is about 20005.0353911209. The cubic root of 400201441 is about 736.9299648026.

Adding to 400201441 its reverse (144102004), we get a palindrome (544303445).

The spelling of 400201441 in words is "four hundred million, two hundred one thousand, four hundred forty-one".