421343402 has 16 divisors (see below), whose sum is σ = 670271112. Its totient is φ = 197959680.

The previous prime is 421343389. The next prime is 421343431. The reversal of 421343402 is 204343124.

It can be written as a sum of positive squares in 4 ways, for example, as 393665281 + 27678121 = 19841^2 + 5261^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12128 + ... + 31460.

Almost surely, 2^421343402 is an apocalyptic number.

421343402 is a deficient number, since it is larger than the sum of its proper divisors (248927710).

421343402 is a wasteful number, since it uses less digits than its factorization.

421343402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19993.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 421343402 is about 20526.6510176405. The cubic root of 421343402 is about 749.6848465526.

Adding to 421343402 its reverse (204343124), we get a palindrome (625686526).

The spelling of 421343402 in words is "four hundred twenty-one million, three hundred forty-three thousand, four hundred two".