42291647 has 8 divisors (see below), whose sum is σ = 43224192. Its totient is φ = 41368600.

The previous prime is 42291617. The next prime is 42291649. The reversal of 42291647 is 74619224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42291647 - 2⁶ = 42291583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42291649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7028 + ... + 11574.

It is an arithmetic number, because the mean of its divisors is an integer number (5403024).

Almost surely, 2^42291647 is an apocalyptic number.

42291647 is a deficient number, since it is larger than the sum of its proper divisors (932545).

42291647 is a wasteful number, since it uses less digits than its factorization.

42291647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749.

The product of its digits is 24192, while the sum is 35.

The square root of 42291647 is about 6503.2028263003. The cubic root of 42291647 is about 348.4053908503.

The spelling of 42291647 in words is "forty-two million, two hundred ninety-one thousand, six hundred forty-seven".