421786729 has 16 divisors (see below), whose sum is σ = 519644160. Its totient is φ = 333385920.

The previous prime is 421786691. The next prime is 421786733. The reversal of 421786729 is 927687124.

It is not a de Polignac number, because 421786729 - 2¹⁵ = 421753961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421786129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129339 + ... + 132559.

It is an arithmetic number, because the mean of its divisors is an integer number (32477760).

Almost surely, 2^421786729 is an apocalyptic number.

It is an amenable number.

421786729 is a deficient number, since it is larger than the sum of its proper divisors (97857431).

421786729 is a wasteful number, since it uses less digits than its factorization.

421786729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4680.

The product of its digits is 338688, while the sum is 46.

The square root of 421786729 is about 20537.4469932365. The cubic root of 421786729 is about 749.9476876106.

The spelling of 421786729 in words is "four hundred twenty-one million, seven hundred eighty-six thousand, seven hundred twenty-nine".