421399846 has 16 divisors (see below), whose sum is σ = 725559840. Its totient is φ = 179809920.

The previous prime is 421399789. The next prime is 421399877. The reversal of 421399846 is 648993124.

It is a junction number, because it is equal to n+sod(n) for n = 421399796 and 421399805.

It is a congruent number.

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, 62515 + ... + 68926.

It is an arithmetic number, because the mean of its divisors is an integer number (45347490).

Almost surely, 2^421399846 is an apocalyptic number.

421399846 is a deficient number, since it is larger than the sum of its proper divisors (304159994).

421399846 is a wasteful number, since it uses less digits than its factorization.

421399846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131679.

The product of its digits is 373248, while the sum is 46.

The square root of 421399846 is about 20528.0258670920. The cubic root of 421399846 is about 749.7183214821.

The spelling of 421399846 in words is "four hundred twenty-one million, three hundred ninety-nine thousand, eight hundred forty-six".