401243505 has 16 divisors (see below), whose sum is σ = 691373760. Its totient is φ = 197535168.

The previous prime is 401243489. The next prime is 401243519. The reversal of 401243505 is 505342104.

401243505 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 401243505 - 2⁴ = 401243489 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1028635 + ... + 1029024.

It is an arithmetic number, because the mean of its divisors is an integer number (43210860).

Almost surely, 2^401243505 is an apocalyptic number.

It is an amenable number.

401243505 is a deficient number, since it is larger than the sum of its proper divisors (290130255).

401243505 is a wasteful number, since it uses less digits than its factorization.

401243505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057680.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 401243505 is about 20031.0635014719. The cubic root of 401243505 is about 737.5690284905.

Adding to 401243505 its reverse (505342104), we get a palindrome (906585609).

The spelling of 401243505 in words is "four hundred one million, two hundred forty-three thousand, five hundred five".