42851147 has 2 divisors, whose sum is σ = 42851148. Its totient is φ = 42851146.

The previous prime is 42851131. The next prime is 42851153. The reversal of 42851147 is 74115824.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42851147 - 2⁴ = 42851131 is a prime.

It is not a weakly prime, because it can be changed into another prime (42851117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21425573 + 21425574.

It is an arithmetic number, because the mean of its divisors is an integer number (21425574).

Almost surely, 2^42851147 is an apocalyptic number.

42851147 is a deficient number, since it is larger than the sum of its proper divisors (1).

42851147 is an equidigital number, since it uses as much as digits as its factorization.

42851147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8960, while the sum is 32.

The square root of 42851147 is about 6546.0787499082. The cubic root of 42851147 is about 349.9350818372.

The spelling of 42851147 in words is "forty-two million, eight hundred fifty-one thousand, one hundred forty-seven".