421717284 has 18 divisors (see below), whose sum is σ = 1066007670. Its totient is φ = 140572416.

The previous prime is 421717271. The next prime is 421717301. The reversal of 421717284 is 482717124.

It can be written as a sum of positive squares in only one way, i.e., 259918884 + 161798400 = 16122^2 + 12720^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 11714369 = 421717284 / (4 + 2 + 1 + 7 + 1 + 7 + 2 + 8 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5857149 + ... + 5857220.

Almost surely, 2^421717284 is an apocalyptic number.

It is an amenable number.

421717284 is an abundant number, since it is smaller than the sum of its proper divisors (644290386).

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

421717284 is a wasteful number, since it uses less digits than its factorization.

421717284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11714379 (or 11714374 counting only the distinct ones).

The product of its digits is 25088, while the sum is 36.

The square root of 421717284 is about 20535.7562315100. The cubic root of 421717284 is about 749.9065270176.

It can be divided in two parts, 42171 and 7284, that added together give a triangular number (49455 = T₃₁₄).

The spelling of 421717284 in words is "four hundred twenty-one million, seven hundred seventeen thousand, two hundred eighty-four".