420532645 has 32 divisors (see below), whose sum is σ = 554770944. Its totient is φ = 304147200.

The previous prime is 420532627. The next prime is 420532649. The reversal of 420532645 is 546235024.

It is a de Polignac number, because none of the positive numbers 2^k-420532645 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420532649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1352040 + ... + 1352350.

It is an arithmetic number, because the mean of its divisors is an integer number (17336592).

Almost surely, 2^420532645 is an apocalyptic number.

It is an amenable number.

420532645 is a deficient number, since it is larger than the sum of its proper divisors (134238299).

420532645 is a wasteful number, since it uses less digits than its factorization.

420532645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693.

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

The square root of 420532645 is about 20506.8926217504. The cubic root of 420532645 is about 749.2036851799.

Adding to 420532645 its reverse (546235024), we get a palindrome (966767669).

The spelling of 420532645 in words is "four hundred twenty million, five hundred thirty-two thousand, six hundred forty-five".