421056767 has 8 divisors (see below), whose sum is σ = 428706432. Its totient is φ = 413455000.

The previous prime is 421056763. The next prime is 421056793. The reversal of 421056767 is 767650124.

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 421056767 - 2² = 421056763 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 421056767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421056761) 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, 6008 + ... + 29634.

It is an arithmetic number, because the mean of its divisors is an integer number (53588304).

Almost surely, 2^421056767 is an apocalyptic number.

421056767 is a deficient number, since it is larger than the sum of its proper divisors (7649665).

421056767 is a wasteful number, since it uses less digits than its factorization.

421056767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23949.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 421056767 is about 20519.6678092020. The cubic root of 421056767 is about 749.5148073704.

The spelling of 421056767 in words is "four hundred twenty-one million, fifty-six thousand, seven hundred sixty-seven".