7420521312 has 36 divisors (see below), whose sum is σ = 21102108300. Its totient is φ = 2473507008.

The previous prime is 7420521299. The next prime is 7420521343. The reversal of 7420521312 is 2131250247.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12882562 + ... + 12883137.

It is an arithmetic number, because the mean of its divisors is an integer number (586169675).

Almost surely, 2^7420521312 is an apocalyptic number.

7420521312 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

7420521312 is an abundant number, since it is smaller than the sum of its proper divisors (13681586988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7420521312 is a wasteful number, since it uses less digits than its factorization.

7420521312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25765715 (or 25765704 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 7420521312 is about 86142.4477943366. The cubic root of 7420521312 is about 1950.4948393086.

Adding to 7420521312 its reverse (2131250247), we get a palindrome (9551771559).

The spelling of 7420521312 in words is "seven billion, four hundred twenty million, five hundred twenty-one thousand, three hundred twelve".