421986143902 has 8 divisors (see below), whose sum is σ = 638580802176. Its totient is φ = 209125876512.

The previous prime is 421986143861. The next prime is 421986143903. The reversal of 421986143902 is 209341689124.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421986143903) 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, 933597438 + ... + 933597889.

It is an arithmetic number, because the mean of its divisors is an integer number (79822600272).

Almost surely, 2^421986143902 is an apocalyptic number.

421986143902 is a deficient number, since it is larger than the sum of its proper divisors (216594658274).

421986143902 is a wasteful number, since it uses less digits than its factorization.

421986143902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867195442.

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 421986143902 in words is "four hundred twenty-one billion, nine hundred eighty-six million, one hundred forty-three thousand, nine hundred two".