42647651 has 4 divisors (see below), whose sum is σ = 42799704. Its totient is φ = 42495600.

The previous prime is 42647639. The next prime is 42647677. The reversal of 42647651 is 15674624.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42647651 - 2⁶ = 42647587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42647851) 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, 75605 + ... + 76166.

It is an arithmetic number, because the mean of its divisors is an integer number (10699926).

Almost surely, 2^42647651 is an apocalyptic number.

42647651 is a deficient number, since it is larger than the sum of its proper divisors (152053).

42647651 is a wasteful number, since it uses less digits than its factorization.

42647651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152052.

The product of its digits is 40320, while the sum is 35.

The square root of 42647651 is about 6530.5169014405. The cubic root of 42647651 is about 349.3802665715.

The spelling of 42647651 in words is "forty-two million, six hundred forty-seven thousand, six hundred fifty-one".