421534345 has 4 divisors (see below), whose sum is σ = 505841220. Its totient is φ = 337227472.

The previous prime is 421534277. The next prime is 421534357. The reversal of 421534345 is 543435124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 120824064 + 300710281 = 10992^2 + 17341^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421534345 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42153430 + ... + 42153439.

It is an arithmetic number, because the mean of its divisors is an integer number (126460305).

Almost surely, 2^421534345 is an apocalyptic number.

It is an amenable number.

421534345 is a deficient number, since it is larger than the sum of its proper divisors (84306875).

421534345 is an equidigital number, since it uses as much as digits as its factorization.

421534345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84306874.

The product of its digits is 28800, while the sum is 31.

The square root of 421534345 is about 20531.3015904983. The cubic root of 421534345 is about 749.7980760109.

Adding to 421534345 its reverse (543435124), we get a palindrome (964969469).

The spelling of 421534345 in words is "four hundred twenty-one million, five hundred thirty-four thousand, three hundred forty-five".