42710521 has 8 divisors (see below), whose sum is σ = 49032704. Its totient is φ = 36443520.

The previous prime is 42710491. The next prime is 42710581. The reversal of 42710521 is 12501724.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42710521 - 2⁵ = 42710489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42710492 and 42710501.

It is not an unprimeable number, because it can be changed into a prime (42710581) 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, 12120 + ... + 15241.

It is an arithmetic number, because the mean of its divisors is an integer number (6129088).

Almost surely, 2^42710521 is an apocalyptic number.

It is an amenable number.

42710521 is a deficient number, since it is larger than the sum of its proper divisors (6322183).

42710521 is a wasteful number, since it uses less digits than its factorization.

42710521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27591.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 42710521 is about 6535.3286833946. The cubic root of 42710521 is about 349.5518645533.

The spelling of 42710521 in words is "forty-two million, seven hundred ten thousand, five hundred twenty-one".