42724647 has 12 divisors (see below), whose sum is σ = 70529680. Its totient is φ = 24414048.

The previous prime is 42724609. The next prime is 42724657. The reversal of 42724647 is 74642724.

It is a happy number.

42724647 is a `hidden beast` number, since 4 + 2 + 7 + 2 + 4 + 647 = 666.

It is not a de Polignac number, because 42724647 - 2⁸ = 42724391 is a prime.

It is a super-2 number, since 2×42724647² = 3650790922549218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42724607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 339022 + ... + 339147.

Almost surely, 2^42724647 is an apocalyptic number.

42724647 is a deficient number, since it is larger than the sum of its proper divisors (27805033).

42724647 is a wasteful number, since it uses less digits than its factorization.

42724647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678182 (or 678179 counting only the distinct ones).

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

The square root of 42724647 is about 6536.4093354073. The cubic root of 42724647 is about 349.5903970215.

The spelling of 42724647 in words is "forty-two million, seven hundred twenty-four thousand, six hundred forty-seven".