420746771 has 4 divisors (see below), whose sum is σ = 420946344. Its totient is φ = 420547200.

The previous prime is 420746749. The next prime is 420746827. The reversal of 420746771 is 177647024.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420746771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420746731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96590 + ... + 100851.

It is an arithmetic number, because the mean of its divisors is an integer number (105236586).

Almost surely, 2^420746771 is an apocalyptic number.

420746771 is a deficient number, since it is larger than the sum of its proper divisors (199573).

420746771 is a wasteful number, since it uses less digits than its factorization.

420746771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199572.

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 420746771 is about 20512.1127873264. The cubic root of 420746771 is about 749.3308229656.

The spelling of 420746771 in words is "four hundred twenty million, seven hundred forty-six thousand, seven hundred seventy-one".