7421247281240 has 128 divisors (see below), whose sum is σ = 19073390656320. Its totient is φ = 2574449049600.

The previous prime is 7421247281221. The next prime is 7421247281267. The reversal of 7421247281240 is 421827421247.

It is a super-2 number, since 2×7421247281240² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7421247281191 and 7421247281200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4312520 + ... + 5782760.

Almost surely, 2^{7421247281240} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7421247281240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9536695328160).

7421247281240 is an abundant number, since it is smaller than the sum of its proper divisors (11652143375080).

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

7421247281240 is a wasteful number, since it uses less digits than its factorization.

7421247281240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470853 (or 1470849 counting only the distinct ones).

The product of its (nonzero) digits is 401408, while the sum is 44.

The spelling of 7421247281240 in words is "seven trillion, four hundred twenty-one billion, two hundred forty-seven million, two hundred eighty-one thousand, two hundred forty".