420732345 has 16 divisors (see below), whose sum is σ = 734369472. Its totient is φ = 203991360.

The previous prime is 420732313. The next prime is 420732373. The reversal of 420732345 is 543237024.

It is not a de Polignac number, because 420732345 - 2⁵ = 420732313 is a prime.

It is a super-2 number, since 2×420732345² = 354031412258398050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1274782 + ... + 1275111.

It is an arithmetic number, because the mean of its divisors is an integer number (45898092).

Almost surely, 2^420732345 is an apocalyptic number.

It is an amenable number.

420732345 is a deficient number, since it is larger than the sum of its proper divisors (313637127).

420732345 is a wasteful number, since it uses less digits than its factorization.

420732345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2549912.

The product of its (nonzero) digits is 20160, while the sum is 30.

The square root of 420732345 is about 20511.7611384298. The cubic root of 420732345 is about 749.3222588515.

Adding to 420732345 its reverse (543237024), we get a palindrome (963969369).

The spelling of 420732345 in words is "four hundred twenty million, seven hundred thirty-two thousand, three hundred forty-five".