42356647 has 2 divisors, whose sum is σ = 42356648. Its totient is φ = 42356646.

The previous prime is 42356641. The next prime is 42356653. The reversal of 42356647 is 74665324.

It is a balanced prime because it is at equal distance from previous prime (42356641) and next prime (42356653).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42356647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42356641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21178323 + 21178324.

It is an arithmetic number, because the mean of its divisors is an integer number (21178324).

Almost surely, 2^42356647 is an apocalyptic number.

42356647 is a deficient number, since it is larger than the sum of its proper divisors (1).

42356647 is an equidigital number, since it uses as much as digits as its factorization.

42356647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 37.

The square root of 42356647 is about 6508.1984450384. The cubic root of 42356647 is about 348.5837929685.

The spelling of 42356647 in words is "forty-two million, three hundred fifty-six thousand, six hundred forty-seven".