42160561 has 8 divisors (see below), whose sum is σ = 44870760. Its totient is φ = 39475968.

The previous prime is 42160553. The next prime is 42160567. The reversal of 42160561 is 16506124.

It can be written as a sum of positive squares in 4 ways, for example, as 14017536 + 28143025 = 3744^2 + 5305^2 .

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 42160561 - 2³ = 42160553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42160567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2946 + ... + 9643.

It is an arithmetic number, because the mean of its divisors is an integer number (5608845).

Almost surely, 2^42160561 is an apocalyptic number.

It is an amenable number.

42160561 is a deficient number, since it is larger than the sum of its proper divisors (2710199).

42160561 is a wasteful number, since it uses less digits than its factorization.

42160561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12803.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 42160561 is about 6493.1164320379. The cubic root of 42160561 is about 348.0450491071.

Adding to 42160561 its reverse (16506124), we get a palindrome (58666685).

The spelling of 42160561 in words is "forty-two million, one hundred sixty thousand, five hundred sixty-one".