42851047 has 4 divisors (see below), whose sum is σ = 44714160. Its totient is φ = 40987936.

The previous prime is 42850963. The next prime is 42851057. The reversal of 42851047 is 74015824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42851047 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 (42851057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 931522 + ... + 931567.

It is an arithmetic number, because the mean of its divisors is an integer number (11178540).

Almost surely, 2^42851047 is an apocalyptic number.

42851047 is a deficient number, since it is larger than the sum of its proper divisors (1863113).

42851047 is a wasteful number, since it uses less digits than its factorization.

42851047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1863112.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 42851047 is about 6546.0711117433. The cubic root of 42851047 is about 349.9348096272.

The spelling of 42851047 in words is "forty-two million, eight hundred fifty-one thousand, forty-seven".