8742540 has 24 divisors (see below), whose sum is σ = 24479280. Its totient is φ = 2331328.

The previous prime is 8742529. The next prime is 8742541. The reversal of 8742540 is 452478.

8742540 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 8742498 and 8742507.

It is not an unprimeable number, because it can be changed into a prime (8742541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72795 + ... + 72914.

It is an arithmetic number, because the mean of its divisors is an integer number (1019970).

Almost surely, 2^8742540 is an apocalyptic number.

It is an amenable number.

8742540 is an abundant number, since it is smaller than the sum of its proper divisors (15736740).

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

8742540 is a wasteful number, since it uses less digits than its factorization.

8742540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145721 (or 145719 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 8742540 is about 2956.7786525203. The cubic root of 8742540 is about 206.0056868383.

The spelling of 8742540 in words is "eight million, seven hundred forty-two thousand, five hundred forty".