421070998 has 4 divisors (see below), whose sum is σ = 631606500. Its totient is φ = 210535498.

The previous prime is 421070987. The next prime is 421071019. The reversal of 421070998 is 899070124.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 421070998.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105267748 + ... + 105267751.

It is an arithmetic number, because the mean of its divisors is an integer number (157901625).

Almost surely, 2^421070998 is an apocalyptic number.

421070998 is a deficient number, since it is larger than the sum of its proper divisors (210535502).

421070998 is a wasteful number, since it uses less digits than its factorization.

421070998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210535501.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 421070998 is about 20520.0145711449. The cubic root of 421070998 is about 749.5232513823.

The spelling of 421070998 in words is "four hundred twenty-one million, seventy thousand, nine hundred ninety-eight".