42147547 has 8 divisors (see below), whose sum is σ = 45738000. Its totient is φ = 38606880.

The previous prime is 42147541. The next prime is 42147557. The reversal of 42147547 is 74574124.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42147547 - 2⁷ = 42147419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42147541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10672 + ... + 14077.

It is an arithmetic number, because the mean of its divisors is an integer number (5717250).

Almost surely, 2^42147547 is an apocalyptic number.

42147547 is a deficient number, since it is larger than the sum of its proper divisors (3590453).

42147547 is a wasteful number, since it uses less digits than its factorization.

42147547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24893.

The product of its digits is 31360, while the sum is 34.

The square root of 42147547 is about 6492.1142164937. The cubic root of 42147547 is about 348.0092342421.

The spelling of 42147547 in words is "forty-two million, one hundred forty-seven thousand, five hundred forty-seven".