421865716 has 6 divisors (see below), whose sum is σ = 738265010. Its totient is φ = 210932856.

The previous prime is 421865713. The next prime is 421865723. The reversal of 421865716 is 617568124.

It can be written as a sum of positive squares in only one way, i.e., 256640400 + 165225316 = 16020^2 + 12854^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421865713) by changing a digit.

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 as a sum of consecutive naturals, namely, 52733211 + ... + 52733218.

Almost surely, 2^421865716 is an apocalyptic number.

It is an amenable number.

421865716 is a deficient number, since it is larger than the sum of its proper divisors (316399294).

421865716 is a wasteful number, since it uses less digits than its factorization.

421865716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105466433 (or 105466431 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 421865716 is about 20539.3699027015. The cubic root of 421865716 is about 749.9944983300.

The spelling of 421865716 in words is "four hundred twenty-one million, eight hundred sixty-five thousand, seven hundred sixteen".