421562879 has 8 divisors (see below), whose sum is σ = 437199120. Its totient is φ = 406000000.

The previous prime is 421562863. The next prime is 421562917. The reversal of 421562879 is 978265124.

It is a happy number.

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

It is not a de Polignac number, because 421562879 - 2⁴ = 421562863 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 (421562179) 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, 6497 + ... + 29754.

It is an arithmetic number, because the mean of its divisors is an integer number (54649890).

Almost surely, 2^421562879 is an apocalyptic number.

421562879 is a deficient number, since it is larger than the sum of its proper divisors (15636241).

421562879 is a wasteful number, since it uses less digits than its factorization.

421562879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36681.

The product of its digits is 241920, while the sum is 44.

The square root of 421562879 is about 20531.9964689263. The cubic root of 421562879 is about 749.8149937748.

The spelling of 421562879 in words is "four hundred twenty-one million, five hundred sixty-two thousand, eight hundred seventy-nine".