421455243 has 16 divisors (see below), whose sum is σ = 639680256. Its totient is φ = 244321440.

The previous prime is 421455241. The next prime is 421455269. The reversal of 421455243 is 342554124.

It is not a de Polignac number, because 421455243 - 2¹ = 421455241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421455243.

It is not an unprimeable number, because it can be changed into a prime (421455241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276880 + ... + 278397.

It is an arithmetic number, because the mean of its divisors is an integer number (39980016).

Almost surely, 2^421455243 is an apocalyptic number.

421455243 is a deficient number, since it is larger than the sum of its proper divisors (218225013).

421455243 is a wasteful number, since it uses less digits than its factorization.

421455243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555314.

The product of its digits is 19200, while the sum is 30.

The square root of 421455243 is about 20529.3751244406. The cubic root of 421455243 is about 749.7511725668.

The spelling of 421455243 in words is "four hundred twenty-one million, four hundred fifty-five thousand, two hundred forty-three".