420243147 has 20 divisors (see below), whose sum is σ = 649421520. Its totient is φ = 270499824.

The previous prime is 420243139. The next prime is 420243149. The reversal of 420243147 is 741342024.

It is not a de Polignac number, because 420243147 - 2³ = 420243139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 420243147.

It is not an unprimeable number, because it can be changed into a prime (420243149) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 87103 + ... + 91800.

It is an arithmetic number, because the mean of its divisors is an integer number (32471076).

Almost surely, 2^420243147 is an apocalyptic number.

420243147 is a deficient number, since it is larger than the sum of its proper divisors (229178373).

420243147 is a wasteful number, since it uses less digits than its factorization.

420243147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178944 (or 178935 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 420243147 is about 20499.8328529771. The cubic root of 420243147 is about 749.0317264664.

The spelling of 420243147 in words is "four hundred twenty million, two hundred forty-three thousand, one hundred forty-seven".