420715243 has 4 divisors (see below), whose sum is σ = 453077968. Its totient is φ = 388352520.

The previous prime is 420715237. The next prime is 420715259. The reversal of 420715243 is 342517024.

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

It is a cyclic number.

It is not a de Polignac number, because 420715243 - 2⁹ = 420714731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420715223) 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, 16181343 + ... + 16181368.

It is an arithmetic number, because the mean of its divisors is an integer number (113269492).

Almost surely, 2^420715243 is an apocalyptic number.

420715243 is a deficient number, since it is larger than the sum of its proper divisors (32362725).

420715243 is a wasteful number, since it uses less digits than its factorization.

420715243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32362724.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 420715243 is about 20511.3442514137. The cubic root of 420715243 is about 749.3121058543.

The spelling of 420715243 in words is "four hundred twenty million, seven hundred fifteen thousand, two hundred forty-three".