7481540 has 48 divisors (see below), whose sum is σ = 17708544. Its totient is φ = 2630400.

The previous prime is 7481531. The next prime is 7481543. The reversal of 7481540 is 451847.

It is not an unprimeable number, because it can be changed into a prime (7481543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6272 + ... + 7368.

It is an arithmetic number, because the mean of its divisors is an integer number (368928).

Almost surely, 2^7481540 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 7481540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8854272).

7481540 is an abundant number, since it is smaller than the sum of its proper divisors (10227004).

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

7481540 is a wasteful number, since it uses less digits than its factorization.

7481540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148 (or 1146 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 7481540 is about 2735.2403916292. The cubic root of 7481540 is about 195.5826535471.

The spelling of 7481540 in words is "seven million, four hundred eighty-one thousand, five hundred forty".