42102647 has 4 divisors (see below), whose sum is σ = 42998496. Its totient is φ = 41206800.

The previous prime is 42102631. The next prime is 42102653. The reversal of 42102647 is 74620124.

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

It is a cyclic number.

It is not a de Polignac number, because 42102647 - 2⁴ = 42102631 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 (42107647) 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, 447854 + ... + 447947.

It is an arithmetic number, because the mean of its divisors is an integer number (10749624).

Almost surely, 2^42102647 is an apocalyptic number.

42102647 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

42102647 is a deficient number, since it is larger than the sum of its proper divisors (895849).

42102647 is an equidigital number, since it uses as much as digits as its factorization.

42102647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895848.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 42102647 is about 6488.6552535945. The cubic root of 42102647 is about 347.8856116536.

The spelling of 42102647 in words is "forty-two million, one hundred two thousand, six hundred forty-seven".