42147825 has 24 divisors (see below), whose sum is σ = 69870528. Its totient is φ = 22418880.

The previous prime is 42147769. The next prime is 42147827. The reversal of 42147825 is 52874124.

It is not a de Polignac number, because 42147825 - 2¹⁰ = 42146801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42147827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54139 + ... + 54911.

It is an arithmetic number, because the mean of its divisors is an integer number (2911272).

Almost surely, 2^42147825 is an apocalyptic number.

It is an amenable number.

42147825 is a deficient number, since it is larger than the sum of its proper divisors (27722703).

42147825 is a wasteful number, since it uses less digits than its factorization.

42147825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513 (or 1508 counting only the distinct ones).

The product of its digits is 17920, while the sum is 33.

The square root of 42147825 is about 6492.1356270491. The cubic root of 42147825 is about 348.0099993824.

The spelling of 42147825 in words is "forty-two million, one hundred forty-seven thousand, eight hundred twenty-five".