401223243 has 16 divisors (see below), whose sum is σ = 539232512. Its totient is φ = 265356000.

The previous prime is 401223233. The next prime is 401223271. The reversal of 401223243 is 342322104.

It is not a de Polignac number, because 401223243 - 2⁵ = 401223211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401223233) 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 15 ways as a sum of consecutive naturals, for example, 342048 + ... + 343218.

It is an arithmetic number, because the mean of its divisors is an integer number (33702032).

Almost surely, 2^401223243 is an apocalyptic number.

401223243 is a deficient number, since it is larger than the sum of its proper divisors (138009269).

401223243 is a wasteful number, since it uses less digits than its factorization.

401223243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 401223243 is about 20030.5577306275. The cubic root of 401223243 is about 737.5566130246.

Adding to 401223243 its reverse (342322104), we get a palindrome (743545347).

It can be divided in two parts, 40122 and 3243, that added together give a triangular number (43365 = T₂₉₄).

The spelling of 401223243 in words is "four hundred one million, two hundred twenty-three thousand, two hundred forty-three".