42360561 has 24 divisors (see below), whose sum is σ = 63921000. Its totient is φ = 26998272.

The previous prime is 42360559. The next prime is 42360569. The reversal of 42360561 is 16506324.

42360561 is a `hidden beast` number, since 42 + 3 + 60 + 561 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5089536 + 37271025 = 2256^2 + 6105^2 .

It is not a de Polignac number, because 42360561 - 2¹ = 42360559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42360569) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27705 + ... + 29193.

It is an arithmetic number, because the mean of its divisors is an integer number (2663375).

Almost surely, 2^42360561 is an apocalyptic number.

It is an amenable number.

42360561 is a deficient number, since it is larger than the sum of its proper divisors (21560439).

42360561 is a wasteful number, since it uses less digits than its factorization.

42360561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633 (or 1630 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 42360561 is about 6508.4991357455. The cubic root of 42360561 is about 348.5945296930.

Adding to 42360561 its reverse (16506324), we get a palindrome (58866885).

The spelling of 42360561 in words is "forty-two million, three hundred sixty thousand, five hundred sixty-one".