421778853 has 32 divisors (see below), whose sum is σ = 686361600. Its totient is φ = 254797488.

The previous prime is 421778843. The next prime is 421778881. The reversal of 421778853 is 358877124.

It is not a de Polignac number, because 421778853 - 2⁵ = 421778821 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 421778799 and 421778808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421778803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6075 + ... + 29672.

It is an arithmetic number, because the mean of its divisors is an integer number (21448800).

Almost surely, 2^421778853 is an apocalyptic number.

It is an amenable number.

421778853 is a deficient number, since it is larger than the sum of its proper divisors (264582747).

421778853 is a wasteful number, since it uses less digits than its factorization.

421778853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35798 (or 35792 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 421778853 is about 20537.2552450419. The cubic root of 421778853 is about 749.9430196711.

The spelling of 421778853 in words is "four hundred twenty-one million, seven hundred seventy-eight thousand, eight hundred fifty-three".