421003817 has 16 divisors (see below), whose sum is σ = 470292480. Its totient is φ = 374203200.

The previous prime is 421003787. The next prime is 421003819. The reversal of 421003817 is 718300124.

It is a cyclic number.

It is not a de Polignac number, because 421003817 - 2¹⁰ = 421002793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421003819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161192 + ... + 163782.

It is an arithmetic number, because the mean of its divisors is an integer number (29393280).

Almost surely, 2^421003817 is an apocalyptic number.

It is an amenable number.

421003817 is a deficient number, since it is larger than the sum of its proper divisors (49288663).

421003817 is a wasteful number, since it uses less digits than its factorization.

421003817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 421003817 is about 20518.3775430710. The cubic root of 421003817 is about 749.4833876380.

The spelling of 421003817 in words is "four hundred twenty-one million, three thousand, eight hundred seventeen".