420545101 has 4 divisors (see below), whose sum is σ = 434111104. Its totient is φ = 406979100.

The previous prime is 420545033. The next prime is 420545119. The reversal of 420545101 is 101545024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420545101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420545161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6782955 + ... + 6783016.

It is an arithmetic number, because the mean of its divisors is an integer number (108527776).

Almost surely, 2^420545101 is an apocalyptic number.

It is an amenable number.

420545101 is a deficient number, since it is larger than the sum of its proper divisors (13566003).

420545101 is a wasteful number, since it uses less digits than its factorization.

420545101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13566002.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 420545101 is about 20507.1963222670. The cubic root of 420545101 is about 749.2110821395.

The spelling of 420545101 in words is "four hundred twenty million, five hundred forty-five thousand, one hundred one".