421854047 has 4 divisors (see below), whose sum is σ = 423410976. Its totient is φ = 420297120.

The previous prime is 421854029. The next prime is 421854061. The reversal of 421854047 is 740458124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421854047 - 2⁸ = 421853791 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421853998 and 421854016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421850047) 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, 778058 + ... + 778599.

It is an arithmetic number, because the mean of its divisors is an integer number (105852744).

Almost surely, 2^421854047 is an apocalyptic number.

421854047 is a deficient number, since it is larger than the sum of its proper divisors (1556929).

421854047 is a wasteful number, since it uses less digits than its factorization.

421854047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556928.

The product of its (nonzero) digits is 35840, while the sum is 35.

The square root of 421854047 is about 20539.0858365215. The cubic root of 421854047 is about 749.9875832018.

The spelling of 421854047 in words is "four hundred twenty-one million, eight hundred fifty-four thousand, forty-seven".