42006537 has 6 divisors (see below), whose sum is σ = 60676122. Its totient is φ = 28004352.

The previous prime is 42006493. The next prime is 42006551. The reversal of 42006537 is 73560024.

It is a happy number.

42006537 is a `hidden beast` number, since 4 + 2 + 0 + 0 + 653 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 39992976 + 2013561 = 6324^2 + 1419^2 .

It is not a de Polignac number, because 42006537 - 2¹⁶ = 41941001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42006537.

It is not an unprimeable number, because it can be changed into a prime (42006557) 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, 2333688 + ... + 2333705.

It is an arithmetic number, because the mean of its divisors is an integer number (10112687).

Almost surely, 2^42006537 is an apocalyptic number.

It is an amenable number.

42006537 is a deficient number, since it is larger than the sum of its proper divisors (18669585).

42006537 is a wasteful number, since it uses less digits than its factorization.

42006537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4667399 (or 4667396 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 42006537 is about 6481.2450192845. The cubic root of 42006537 is about 347.6206975104.

The spelling of 42006537 in words is "forty-two million, six thousand, five hundred thirty-seven".