421430605 has 8 divisors (see below), whose sum is σ = 505831392. Its totient is φ = 337068048.

The previous prime is 421430599. The next prime is 421430609. The reversal of 421430605 is 506034124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421430605 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421430605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421430609) 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, 28434 + ... + 40636.

It is an arithmetic number, because the mean of its divisors is an integer number (63228924).

Almost surely, 2^421430605 is an apocalyptic number.

It is an amenable number.

421430605 is a deficient number, since it is larger than the sum of its proper divisors (84400787).

421430605 is a wasteful number, since it uses less digits than its factorization.

421430605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19115.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 421430605 is about 20528.7750486969. The cubic root of 421430605 is about 749.7365622931.

Adding to 421430605 its reverse (506034124), we get a palindrome (927464729).

The spelling of 421430605 in words is "four hundred twenty-one million, four hundred thirty thousand, six hundred five".