421403171402 has 8 divisors (see below), whose sum is σ = 644031262116. Its totient is φ = 206726084032.

The previous prime is 421403171393. The next prime is 421403171417. The reversal of 421403171402 is 204171304124.

It can be written as a sum of positive squares in 2 ways, for example, as 335566476961 + 85836694441 = 579281^2 + 292979^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1987750703 + ... + 1987750914.

Almost surely, 2^421403171402 is an apocalyptic number.

421403171402 is a deficient number, since it is larger than the sum of its proper divisors (222628090714).

421403171402 is a wasteful number, since it uses less digits than its factorization.

421403171402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3975501672.

The product of its (nonzero) digits is 5376, while the sum is 29.

Adding to 421403171402 its reverse (204171304124), we get a palindrome (625574475526).

The spelling of 421403171402 in words is "four hundred twenty-one billion, four hundred three million, one hundred seventy-one thousand, four hundred two".