421428511 has 8 divisors (see below), whose sum is σ = 482641920. Its totient is φ = 360467448.

The previous prime is 421428481. The next prime is 421428533. The reversal of 421428511 is 115824124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421428511 - 2⁵ = 421428479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421428511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421428541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59491 + ... + 66196.

It is an arithmetic number, because the mean of its divisors is an integer number (60330240).

Almost surely, 2^421428511 is an apocalyptic number.

421428511 is a deficient number, since it is larger than the sum of its proper divisors (61213409).

421428511 is a wasteful number, since it uses less digits than its factorization.

421428511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126173.

The product of its digits is 2560, while the sum is 28.

The square root of 421428511 is about 20528.7240470517. The cubic root of 421428511 is about 749.7353205300.

It can be divided in two parts, 42142 and 8511, that added together give a cube (50653 = 37³).

The spelling of 421428511 in words is "four hundred twenty-one million, four hundred twenty-eight thousand, five hundred eleven".