421730854 has 4 divisors (see below), whose sum is σ = 632596284. Its totient is φ = 210865426.

The previous prime is 421730833. The next prime is 421730863. The reversal of 421730854 is 458037124.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105432712 + ... + 105432715.

It is an arithmetic number, because the mean of its divisors is an integer number (158149071).

Almost surely, 2^421730854 is an apocalyptic number.

421730854 is a deficient number, since it is larger than the sum of its proper divisors (210865430).

421730854 is a wasteful number, since it uses less digits than its factorization.

421730854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210865429.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 421730854 is about 20536.0866281772. The cubic root of 421730854 is about 749.9145704176.

Adding to 421730854 its reverse (458037124), we get a palindrome (879767978).

The spelling of 421730854 in words is "four hundred twenty-one million, seven hundred thirty thousand, eight hundred fifty-four".