420442345 has 8 divisors (see below), whose sum is σ = 510917760. Its totient is φ = 332095920.

The previous prime is 420442339. The next prime is 420442349. The reversal of 420442345 is 543244024.

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

It is not a de Polignac number, because 420442345 - 2²³ = 412053737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420442349) 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, 531811 + ... + 532600.

It is an arithmetic number, because the mean of its divisors is an integer number (63864720).

Almost surely, 2^420442345 is an apocalyptic number.

It is an amenable number.

420442345 is a deficient number, since it is larger than the sum of its proper divisors (90475415).

420442345 is a wasteful number, since it uses less digits than its factorization.

420442345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064495.

The product of its (nonzero) digits is 15360, while the sum is 28.

The square root of 420442345 is about 20504.6908047890. The cubic root of 420442345 is about 749.1500564177.

Adding to 420442345 its reverse (543244024), we get a palindrome (963686369).

The spelling of 420442345 in words is "four hundred twenty million, four hundred forty-two thousand, three hundred forty-five".