421072071 has 16 divisors (see below), whose sum is σ = 647633664. Its totient is φ = 238362624.

The previous prime is 421072033. The next prime is 421072073. The reversal of 421072071 is 170270124.

It is not a de Polignac number, because 421072071 - 2²² = 416877767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421072073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91450 + ... + 95943.

It is an arithmetic number, because the mean of its divisors is an integer number (40477104).

Almost surely, 2^421072071 is an apocalyptic number.

421072071 is a deficient number, since it is larger than the sum of its proper divisors (226561593).

421072071 is a wasteful number, since it uses less digits than its factorization.

421072071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187510.

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 421072071 is about 20520.0407163339. The cubic root of 421072071 is about 749.5238880427.

The spelling of 421072071 in words is "four hundred twenty-one million, seventy-two thousand, seventy-one".