42708247 has 2 divisors, whose sum is σ = 42708248. Its totient is φ = 42708246.

The previous prime is 42708241. The next prime is 42708277. The reversal of 42708247 is 74280724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42708247 - 2²³ = 34319639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42708241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21354123 + 21354124.

It is an arithmetic number, because the mean of its divisors is an integer number (21354124).

Almost surely, 2^42708247 is an apocalyptic number.

42708247 is a deficient number, since it is larger than the sum of its proper divisors (1).

42708247 is an equidigital number, since it uses as much as digits as its factorization.

42708247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 42708247 is about 6535.1547036011. The cubic root of 42708247 is about 349.5456608122.

The spelling of 42708247 in words is "forty-two million, seven hundred eight thousand, two hundred forty-seven".