42001247 has 2 divisors, whose sum is σ = 42001248. Its totient is φ = 42001246.

The previous prime is 42001241. The next prime is 42001259. The reversal of 42001247 is 74210024.

42001247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42001247 - 2²² = 37806943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42001241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21000623 + 21000624.

It is an arithmetic number, because the mean of its divisors is an integer number (21000624).

Almost surely, 2^42001247 is an apocalyptic number.

42001247 is a deficient number, since it is larger than the sum of its proper divisors (1).

42001247 is an equidigital number, since it uses as much as digits as its factorization.

42001247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 42001247 is about 6480.8369058325. The cubic root of 42001247 is about 347.6061046175.

The spelling of 42001247 in words is "forty-two million, one thousand, two hundred forty-seven".