421859869 has 8 divisors (see below), whose sum is σ = 446725440. Its totient is φ = 397260576.

The previous prime is 421859863. The next prime is 421859891. The reversal of 421859869 is 968958124.

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 421859869 - 2⁷ = 421859741 is a prime.

It is a super-2 number, since 2×421859869² = 355931498145394322, 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 (421859863) 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, 63304 + ... + 69649.

It is an arithmetic number, because the mean of its divisors is an integer number (55840680).

Almost surely, 2^421859869 is an apocalyptic number.

It is an amenable number.

421859869 is a deficient number, since it is larger than the sum of its proper divisors (24865571).

421859869 is a wasteful number, since it uses less digits than its factorization.

421859869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133139.

The product of its digits is 1244160, while the sum is 52.

The square root of 421859869 is about 20539.2275658069. The cubic root of 421859869 is about 749.9910333743.

The spelling of 421859869 in words is "four hundred twenty-one million, eight hundred fifty-nine thousand, eight hundred sixty-nine".