42517740 has 48 divisors (see below), whose sum is σ = 122895360. Its totient is φ = 10971840.

The previous prime is 42517729. The next prime is 42517747. The reversal of 42517740 is 4771524.

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

It is a zygodrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 42517698 and 42517707.

It is not an unprimeable number, because it can be changed into a prime (42517747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9570 + ... + 13289.

It is an arithmetic number, because the mean of its divisors is an integer number (2560320).

Almost surely, 2^42517740 is an apocalyptic number.

It is an amenable number.

42517740 is an abundant number, since it is smaller than the sum of its proper divisors (80377620).

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

42517740 is a wasteful number, since it uses less digits than its factorization.

42517740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22902 (or 22900 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 42517740 is about 6520.5628591403. The cubic root of 42517740 is about 349.0251512376.

The spelling of 42517740 in words is "forty-two million, five hundred seventeen thousand, seven hundred forty".