421229287 has 8 divisors (see below), whose sum is σ = 425949552. Its totient is φ = 416520000.

The previous prime is 421229269. The next prime is 421229293. The reversal of 421229287 is 782922124.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421229287 is a prime.

It is a super-3 number, since 3×421229287³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421229227) 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 7 ways as a sum of consecutive naturals, for example, 92412 + ... + 96862.

It is an arithmetic number, because the mean of its divisors is an integer number (53243694).

Almost surely, 2^421229287 is an apocalyptic number.

421229287 is a deficient number, since it is larger than the sum of its proper divisors (4720265).

421229287 is a wasteful number, since it uses less digits than its factorization.

421229287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5489.

The product of its digits is 32256, while the sum is 37.

The square root of 421229287 is about 20523.8711504433. The cubic root of 421229287 is about 749.6171598704.

The spelling of 421229287 in words is "four hundred twenty-one million, two hundred twenty-nine thousand, two hundred eighty-seven".