400422241 has 4 divisors (see below), whose sum is σ = 401314500. Its totient is φ = 399529984.

The previous prime is 400422181. The next prime is 400422247. The reversal of 400422241 is 142224004.

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 300502225 + 99920016 = 17335^2 + 9996^2 .

It is a cyclic number.

It is not a de Polignac number, because 400422241 - 2¹⁷ = 400291169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400422247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445456 + ... + 446353.

It is an arithmetic number, because the mean of its divisors is an integer number (100328625).

Almost surely, 2^400422241 is an apocalyptic number.

It is an amenable number.

400422241 is a deficient number, since it is larger than the sum of its proper divisors (892259).

400422241 is an equidigital number, since it uses as much as digits as its factorization.

400422241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892258.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 400422241 is about 20010.5532407278. The cubic root of 400422241 is about 737.0654667477.

Adding to 400422241 its reverse (142224004), we get a palindrome (542646245).

The spelling of 400422241 in words is "four hundred million, four hundred twenty-two thousand, two hundred forty-one".