42472147 has 2 divisors, whose sum is σ = 42472148. Its totient is φ = 42472146.

The previous prime is 42472127. The next prime is 42472169. The reversal of 42472147 is 74127424.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42472147 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42472127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21236073 + 21236074.

It is an arithmetic number, because the mean of its divisors is an integer number (21236074).

Almost surely, 2^42472147 is an apocalyptic number.

42472147 is a deficient number, since it is larger than the sum of its proper divisors (1).

42472147 is an equidigital number, since it uses as much as digits as its factorization.

42472147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12544, while the sum is 31.

The square root of 42472147 is about 6517.0658275024. The cubic root of 42472147 is about 348.9003500359.

The spelling of 42472147 in words is "forty-two million, four hundred seventy-two thousand, one hundred forty-seven".