42521601 has 8 divisors (see below), whose sum is σ = 59679520. Its totient is φ = 26855712.

The previous prime is 42521597. The next prime is 42521603. The reversal of 42521601 is 10612524.

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

It is not a de Polignac number, because 42521601 - 2² = 42521597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42521603) 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, 372940 + ... + 373053.

It is an arithmetic number, because the mean of its divisors is an integer number (7459940).

Almost surely, 2^42521601 is an apocalyptic number.

It is an amenable number.

42521601 is a deficient number, since it is larger than the sum of its proper divisors (17157919).

42521601 is a wasteful number, since it uses less digits than its factorization.

42521601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746015.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 42521601 is about 6520.8589158178. The cubic root of 42521601 is about 349.0357158107.

The spelling of 42521601 in words is "forty-two million, five hundred twenty-one thousand, six hundred one".