421261998 has 8 divisors (see below), whose sum is σ = 842524008. Its totient is φ = 140420664.

The previous prime is 421261991. The next prime is 421261999. The reversal of 421261998 is 899162124.

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

421261998 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421261991) by changing a digit.

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, 35105161 + ... + 35105172.

It is an arithmetic number, because the mean of its divisors is an integer number (105315501).

Almost surely, 2^421261998 is an apocalyptic number.

421261998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421261998 is a wasteful number, since it uses less digits than its factorization.

421261998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70210338.

The product of its digits is 62208, while the sum is 42.

The square root of 421261998 is about 20524.6680362923. The cubic root of 421261998 is about 749.6365634692.

The spelling of 421261998 in words is "four hundred twenty-one million, two hundred sixty-one thousand, nine hundred ninety-eight".