42802521 has 8 divisors (see below), whose sum is σ = 59038080. Its totient is φ = 27550992.

The previous prime is 42802489. The next prime is 42802523. The reversal of 42802521 is 12520824.

42802521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42802521 - 2⁵ = 42802489 is a prime.

It is a super-4 number, since 4×42802521⁴ (a number of 32 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42802491 and 42802500.

It is not an unprimeable number, because it can be changed into a prime (42802523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245905 + ... + 246078.

It is an arithmetic number, because the mean of its divisors is an integer number (7379760).

Almost surely, 2^42802521 is an apocalyptic number.

It is an amenable number.

42802521 is a deficient number, since it is larger than the sum of its proper divisors (16235559).

42802521 is a wasteful number, since it uses less digits than its factorization.

42802521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492015.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 42802521 is about 6542.3635637283. The cubic root of 42802521 is about 349.8026669942.

The spelling of 42802521 in words is "forty-two million, eight hundred two thousand, five hundred twenty-one".