421216477 has 8 divisors (see below), whose sum is σ = 459675360. Its totient is φ = 382785360.

The previous prime is 421216459. The next prime is 421216487. The reversal of 421216477 is 774612124.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 421216477 - 2¹⁹ = 420692189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421216487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36799 + ... + 46867.

It is an arithmetic number, because the mean of its divisors is an integer number (57459420).

Almost surely, 2^421216477 is an apocalyptic number.

It is an amenable number.

421216477 is a deficient number, since it is larger than the sum of its proper divisors (38458883).

421216477 is a wasteful number, since it uses less digits than its factorization.

421216477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13883.

The product of its digits is 18816, while the sum is 34.

The square root of 421216477 is about 20523.5590724416. The cubic root of 421216477 is about 749.6095609265.

The spelling of 421216477 in words is "four hundred twenty-one million, two hundred sixteen thousand, four hundred seventy-seven".