42870547 has 2 divisors, whose sum is σ = 42870548. Its totient is φ = 42870546.

The previous prime is 42870493. The next prime is 42870571. The reversal of 42870547 is 74507824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42870547 - 2¹¹ = 42868499 is a prime.

It is not a weakly prime, because it can be changed into another prime (42870647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21435273 + 21435274.

It is an arithmetic number, because the mean of its divisors is an integer number (21435274).

Almost surely, 2^42870547 is an apocalyptic number.

42870547 is a deficient number, since it is larger than the sum of its proper divisors (1).

42870547 is an equidigital number, since it uses as much as digits as its factorization.

42870547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 42870547 is about 6547.5603853649. The cubic root of 42870547 is about 349.9878825737.

The spelling of 42870547 in words is "forty-two million, eight hundred seventy thousand, five hundred forty-seven".