421102345 has 4 divisors (see below), whose sum is σ = 505322820. Its totient is φ = 336881872.

The previous prime is 421102327. The next prime is 421102361. The reversal of 421102345 is 543201124.

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 92006464 + 329095881 = 9592^2 + 18141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421102345 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42110230 + ... + 42110239.

It is an arithmetic number, because the mean of its divisors is an integer number (126330705).

Almost surely, 2^421102345 is an apocalyptic number.

It is an amenable number.

421102345 is a deficient number, since it is larger than the sum of its proper divisors (84220475).

421102345 is an equidigital number, since it uses as much as digits as its factorization.

421102345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84220474.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 421102345 is about 20520.7783721768. The cubic root of 421102345 is about 749.5418505595.

Adding to 421102345 its reverse (543201124), we get a palindrome (964303469).

The spelling of 421102345 in words is "four hundred twenty-one million, one hundred two thousand, three hundred forty-five".