42647427 has 6 divisors (see below), whose sum is σ = 61601852. Its totient is φ = 28431612.

The previous prime is 42647417. The next prime is 42647447. The reversal of 42647427 is 72474624.

It is a happy number.

42647427 is a `hidden beast` number, since 4 + 2 + 647 + 4 + 2 + 7 = 666.

It is not a de Polignac number, because 42647427 - 2⁴ = 42647411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42647391 and 42647400.

It is not an unprimeable number, because it can be changed into a prime (42647417) 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, 2369293 + ... + 2369310.

Almost surely, 2^42647427 is an apocalyptic number.

42647427 is a deficient number, since it is larger than the sum of its proper divisors (18954425).

42647427 is a wasteful number, since it uses less digits than its factorization.

42647427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4738609 (or 4738606 counting only the distinct ones).

The product of its digits is 75264, while the sum is 36.

The square root of 42647427 is about 6530.4997511676. The cubic root of 42647427 is about 349.3796548823.

The spelling of 42647427 in words is "forty-two million, six hundred forty-seven thousand, four hundred twenty-seven".