42537540 has 24 divisors (see below), whose sum is σ = 119105280. Its totient is φ = 11343328.

The previous prime is 42537503. The next prime is 42537581. The reversal of 42537540 is 4573524.

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 = 42537498 and 42537507.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354420 + ... + 354539.

It is an arithmetic number, because the mean of its divisors is an integer number (4962720).

Almost surely, 2^42537540 is an apocalyptic number.

It is an amenable number.

42537540 is an abundant number, since it is smaller than the sum of its proper divisors (76567740).

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

42537540 is a wasteful number, since it uses less digits than its factorization.

42537540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708971 (or 708969 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 42537540 is about 6522.0809562593. The cubic root of 42537540 is about 349.0793217676.

The spelling of 42537540 in words is "forty-two million, five hundred thirty-seven thousand, five hundred forty".