42481561 has 8 divisors (see below), whose sum is σ = 43585920. Its totient is φ = 41385648.

The previous prime is 42481519. The next prime is 42481577. The reversal of 42481561 is 16518424.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42481561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42481261) 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, 8790 + ... + 12736.

It is an arithmetic number, because the mean of its divisors is an integer number (5448240).

Almost surely, 2^42481561 is an apocalyptic number.

It is an amenable number.

42481561 is a deficient number, since it is larger than the sum of its proper divisors (1104359).

42481561 is a wasteful number, since it uses less digits than its factorization.

42481561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4223.

The product of its digits is 7680, while the sum is 31.

The square root of 42481561 is about 6517.7880450349. The cubic root of 42481561 is about 348.9261261855.

Adding to 42481561 its reverse (16518424), we get a palindrome (58999985).

The spelling of 42481561 in words is "forty-two million, four hundred eighty-one thousand, five hundred sixty-one".