621340012 has 12 divisors (see below), whose sum is σ = 1097507880. Its totient is φ = 307766336.

The previous prime is 621339991. The next prime is 621340019. The reversal of 621340012 is 210043126.

It is not an unprimeable number, because it can be changed into a prime (621340019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 725437 + ... + 726292.

It is an arithmetic number, because the mean of its divisors is an integer number (91458990).

Almost surely, 2^621340012 is an apocalyptic number.

It is an amenable number.

621340012 is a deficient number, since it is larger than the sum of its proper divisors (476167868).

621340012 is a wasteful number, since it uses less digits than its factorization.

621340012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451840 (or 1451838 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 621340012 is about 24926.6927609741. The cubic root of 621340012 is about 853.3157739035.

Adding to 621340012 its reverse (210043126), we get a palindrome (831383138).

It can be divided in two parts, 6213 and 40012, that added together give a square (46225 = 215²).

The spelling of 621340012 in words is "six hundred twenty-one million, three hundred forty thousand, twelve".