421340402 has 32 divisors (see below), whose sum is σ = 740986752. Its totient is φ = 175924224.

The previous prime is 421340389. The next prime is 421340411. The reversal of 421340402 is 204043124.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346748 + ... + 347960.

It is an arithmetic number, because the mean of its divisors is an integer number (23155836).

Almost surely, 2^421340402 is an apocalyptic number.

421340402 is a deficient number, since it is larger than the sum of its proper divisors (319646350).

421340402 is a wasteful number, since it uses less digits than its factorization.

421340402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 421340402 is about 20526.5779417807. The cubic root of 421340402 is about 749.6830672756.

Adding to 421340402 its reverse (204043124), we get a palindrome (625383526).

The spelling of 421340402 in words is "four hundred twenty-one million, three hundred forty thousand, four hundred two".