42454871 has 2 divisors, whose sum is σ = 42454872. Its totient is φ = 42454870.

The previous prime is 42454847. The next prime is 42454877. The reversal of 42454871 is 17845424.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42454871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42454877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21227435 + 21227436.

It is an arithmetic number, because the mean of its divisors is an integer number (21227436).

Almost surely, 2^42454871 is an apocalyptic number.

42454871 is a deficient number, since it is larger than the sum of its proper divisors (1).

42454871 is an equidigital number, since it uses as much as digits as its factorization.

42454871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35840, while the sum is 35.

The square root of 42454871 is about 6515.7402495802. The cubic root of 42454871 is about 348.8530373041.

The spelling of 42454871 in words is "forty-two million, four hundred fifty-four thousand, eight hundred seventy-one".