42070547 has 2 divisors, whose sum is σ = 42070548. Its totient is φ = 42070546.

The previous prime is 42070543. The next prime is 42070559. The reversal of 42070547 is 74507024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42070547 - 2² = 42070543 is a prime.

It is not a weakly prime, because it can be changed into another prime (42070543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21035273 + 21035274.

It is an arithmetic number, because the mean of its divisors is an integer number (21035274).

Almost surely, 2^42070547 is an apocalyptic number.

42070547 is a deficient number, since it is larger than the sum of its proper divisors (1).

42070547 is an equidigital number, since it uses as much as digits as its factorization.

42070547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 42070547 is about 6486.1812339774. The cubic root of 42070547 is about 347.7971772505.

The spelling of 42070547 in words is "forty-two million, seventy thousand, five hundred forty-seven".