401321042 has 4 divisors (see below), whose sum is σ = 601981566. Its totient is φ = 200660520.

The previous prime is 401321029. The next prime is 401321047. The reversal of 401321042 is 240123104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 395651881 + 5669161 = 19891^2 + 2381^2 .

It is a super-3 number, since 3×401321042³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 401321042.

It is not an unprimeable number, because it can be changed into a prime (401321047) 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 as a sum of consecutive naturals, namely, 100330259 + ... + 100330262.

Almost surely, 2^401321042 is an apocalyptic number.

401321042 is a deficient number, since it is larger than the sum of its proper divisors (200660524).

401321042 is a wasteful number, since it uses less digits than its factorization.

401321042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200660523.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 401321042 is about 20032.9988269355. The cubic root of 401321042 is about 737.6165351423.

Adding to 401321042 its reverse (240123104), we get a palindrome (641444146).

The spelling of 401321042 in words is "four hundred one million, three hundred twenty-one thousand, forty-two".