42061521 has 8 divisors (see below), whose sum is σ = 56210400. Its totient is φ = 27976832.

The previous prime is 42061501. The next prime is 42061529. The reversal of 42061521 is 12516024.

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 42061521 - 2¹¹ = 42059473 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42061529) 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, 14496 + ... + 17153.

It is an arithmetic number, because the mean of its divisors is an integer number (7026300).

Almost surely, 2^42061521 is an apocalyptic number.

It is an amenable number.

42061521 is a deficient number, since it is larger than the sum of its proper divisors (14148879).

42061521 is a wasteful number, since it uses less digits than its factorization.

42061521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32095.

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

The square root of 42061521 is about 6485.4854097438. The cubic root of 42061521 is about 347.7723028267.

Adding to 42061521 its reverse (12516024), we get a palindrome (54577545).

The spelling of 42061521 in words is "forty-two million, sixty-one thousand, five hundred twenty-one".