42647537 has 4 divisors (see below), whose sum is σ = 44023296. Its totient is φ = 41271780.

The previous prime is 42647477. The next prime is 42647557. The reversal of 42647537 is 73574624.

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 42647537 - 2¹⁴ = 42631153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42647537.

It is not an unprimeable number, because it can be changed into a prime (42647557) 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, 687833 + ... + 687894.

It is an arithmetic number, because the mean of its divisors is an integer number (11005824).

Almost surely, 2^42647537 is an apocalyptic number.

It is an amenable number.

42647537 is a deficient number, since it is larger than the sum of its proper divisors (1375759).

42647537 is a wasteful number, since it uses less digits than its factorization.

42647537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375758.

The product of its digits is 141120, while the sum is 38.

The square root of 42647537 is about 6530.5081731822. The cubic root of 42647537 is about 349.3799552657.

The spelling of 42647537 in words is "forty-two million, six hundred forty-seven thousand, five hundred thirty-seven".