7421287251236 has 12 divisors (see below), whose sum is σ = 12993284870412. Its totient is φ = 3708920145408.

The previous prime is 7421287251223. The next prime is 7421287251239. The reversal of 7421287251236 is 6321527821247.

It can be written as a sum of positive squares in 2 ways, for example, as 3729317148736 + 3691970102500 = 1931144^2 + 1921450^2 .

It is not an unprimeable number, because it can be changed into a prime (7421287251239) 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, 430860365 + ... + 430877588.

It is an arithmetic number, because the mean of its divisors is an integer number (1082773739201).

Almost surely, 2^{7421287251236} is an apocalyptic number.

It is an amenable number.

7421287251236 is a deficient number, since it is larger than the sum of its proper divisors (5571997619176).

7421287251236 is a wasteful number, since it uses less digits than its factorization.

7421287251236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861740110 (or 861740108 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 50.

The spelling of 7421287251236 in words is "seven trillion, four hundred twenty-one billion, two hundred eighty-seven million, two hundred fifty-one thousand, two hundred thirty-six".