42870247 has 18 divisors (see below), whose sum is σ = 50875008. Its totient is φ = 36017352.

The previous prime is 42870227. The next prime is 42870253. The reversal of 42870247 is 74207824.

It is not a de Polignac number, because 42870247 - 2⁷ = 42870119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42870227) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 337498 + ... + 337624.

Almost surely, 2^42870247 is an apocalyptic number.

42870247 is a deficient number, since it is larger than the sum of its proper divisors (8004761).

42870247 is an equidigital number, since it uses as much as digits as its factorization.

42870247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 42870247 is about 6547.5374760287. The cubic root of 42870247 is about 349.9870661887.

The spelling of 42870247 in words is "forty-two million, eight hundred seventy thousand, two hundred forty-seven".