421254243 has 8 divisors (see below), whose sum is σ = 624080400. Its totient is φ = 280836144.

The previous prime is 421254233. The next prime is 421254293. The reversal of 421254243 is 342452124.

It is not a de Polignac number, because 421254243 - 2⁶ = 421254179 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 15602009 = 421254243 / (4 + 2 + 1 + 2 + 5 + 4 + 2 + 4 + 3).

It is not an unprimeable number, because it can be changed into a prime (421254233) 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, 7800978 + ... + 7801031.

It is an arithmetic number, because the mean of its divisors is an integer number (78010050).

Almost surely, 2^421254243 is an apocalyptic number.

421254243 is a deficient number, since it is larger than the sum of its proper divisors (202826157).

421254243 is a wasteful number, since it uses less digits than its factorization.

421254243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15602018 (or 15602012 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 421254243 is about 20524.4791164112. The cubic root of 421254243 is about 749.6319634283.

The spelling of 421254243 in words is "four hundred twenty-one million, two hundred fifty-four thousand, two hundred forty-three".