42540516 has 18 divisors (see below), whose sum is σ = 107533062. Its totient is φ = 14180160.

The previous prime is 42540497. The next prime is 42540517. The reversal of 42540516 is 61504524.

It can be written as a sum of positive squares in only one way, i.e., 40449600 + 2090916 = 6360^2 + 1446^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 42540516.

It is not an unprimeable number, because it can be changed into a prime (42540517) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 590805 + ... + 590876.

It is an arithmetic number, because the mean of its divisors is an integer number (5974059).

Almost surely, 2^42540516 is an apocalyptic number.

It is an amenable number.

42540516 is an abundant number, since it is smaller than the sum of its proper divisors (64992546).

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

42540516 is a wasteful number, since it uses less digits than its factorization.

42540516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181691 (or 1181686 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 42540516 is about 6522.3091003110. The cubic root of 42540516 is about 349.0874623091.

The spelling of 42540516 in words is "forty-two million, five hundred forty thousand, five hundred sixteen".