401040202 has 4 divisors (see below), whose sum is σ = 601560306. Its totient is φ = 200520100.

The previous prime is 401040181. The next prime is 401040203. The reversal of 401040202 is 202040104.

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., 400760361 + 279841 = 20019^2 + 529^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (401040203) 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, 100260049 + ... + 100260052.

Almost surely, 2^401040202 is an apocalyptic number.

401040202 is a deficient number, since it is larger than the sum of its proper divisors (200520104).

401040202 is a wasteful number, since it uses less digits than its factorization.

401040202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200520103.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 401040202 is about 20025.9881653815. The cubic root of 401040202 is about 737.4444363770. Note that the first 4 decimals are identical.

Adding to 401040202 its reverse (202040104), we get a palindrome (603080306).

The spelling of 401040202 in words is "four hundred one million, forty thousand, two hundred two".