42745537 has 4 divisors (see below), whose sum is σ = 43145136. Its totient is φ = 42345940.

The previous prime is 42745529. The next prime is 42745541. The reversal of 42745537 is 73554724.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42745537 - 2³ = 42745529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42745496 and 42745505.

It is not an unprimeable number, because it can be changed into a prime (42745517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199639 + ... + 199852.

It is an arithmetic number, because the mean of its divisors is an integer number (10786284).

Almost surely, 2^42745537 is an apocalyptic number.

It is an amenable number.

42745537 is a deficient number, since it is larger than the sum of its proper divisors (399599).

42745537 is a wasteful number, since it uses less digits than its factorization.

42745537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399598.

The product of its digits is 117600, while the sum is 37.

The square root of 42745537 is about 6538.0071122629. The cubic root of 42745537 is about 349.6473645565.

The spelling of 42745537 in words is "forty-two million, seven hundred forty-five thousand, five hundred thirty-seven".