420521324 has 12 divisors (see below), whose sum is σ = 759651648. Its totient is φ = 203478000.

The previous prime is 420521273. The next prime is 420521327. The reversal of 420521324 is 423125024.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 420521324.

It is not an unprimeable number, because it can be changed into a prime (420521327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1695527 + ... + 1695774.

It is an arithmetic number, because the mean of its divisors is an integer number (63304304).

Almost surely, 2^420521324 is an apocalyptic number.

It is an amenable number.

420521324 is a deficient number, since it is larger than the sum of its proper divisors (339130324).

420521324 is a wasteful number, since it uses less digits than its factorization.

420521324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3391336 (or 3391334 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 420521324 is about 20506.6165907494. The cubic root of 420521324 is about 749.1969621100.

Adding to 420521324 its reverse (423125024), we get a palindrome (843646348).

The spelling of 420521324 in words is "four hundred twenty million, five hundred twenty-one thousand, three hundred twenty-four".