421585869 has 4 divisors (see below), whose sum is σ = 562114496. Its totient is φ = 281057244.

The previous prime is 421585849. The next prime is 421585897. The reversal of 421585869 is 968585124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 421585869 - 2¹³ = 421577677 is a prime.

It is a super-2 number, since 2×421585869² = 355469289880970322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421585819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70264309 + ... + 70264314.

It is an arithmetic number, because the mean of its divisors is an integer number (140528624).

Almost surely, 2^421585869 is an apocalyptic number.

It is an amenable number.

421585869 is a deficient number, since it is larger than the sum of its proper divisors (140528627).

421585869 is a wasteful number, since it uses less digits than its factorization.

421585869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140528626.

The product of its digits is 691200, while the sum is 48.

The square root of 421585869 is about 20532.5563191727. The cubic root of 421585869 is about 749.8286239544.

The spelling of 421585869 in words is "four hundred twenty-one million, five hundred eighty-five thousand, eight hundred sixty-nine".