42821075 has 24 divisors (see below), whose sum is σ = 59805696. Its totient is φ = 30132000.

The previous prime is 42821069. The next prime is 42821087. The reversal of 42821075 is 57012824.

It is not a de Polignac number, because 42821075 - 2⁴ = 42821059 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6014 + ... + 11036.

It is an arithmetic number, because the mean of its divisors is an integer number (2491904).

Almost surely, 2^42821075 is an apocalyptic number.

42821075 is a deficient number, since it is larger than the sum of its proper divisors (16984621).

42821075 is a wasteful number, since it uses less digits than its factorization.

42821075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5075 (or 5070 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 42821075 is about 6543.7813991606. The cubic root of 42821075 is about 349.8532037458.

Adding to 42821075 its reverse (57012824), we get a palindrome (99833899).

The spelling of 42821075 in words is "forty-two million, eight hundred twenty-one thousand, seventy-five".