42116761 has 4 divisors (see below), whose sum is σ = 42143332. Its totient is φ = 42090192.

The previous prime is 42116759. The next prime is 42116777. The reversal of 42116761 is 16761124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5089536 + 37027225 = 2256^2 + 6085^2 .

It is a cyclic number.

It is not a de Polignac number, because 42116761 - 2¹ = 42116759 is a prime.

It is a super-2 number, since 2×42116761² = 3547643114262242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42116461) 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 3 ways as a sum of consecutive naturals, for example, 10746 + ... + 14131.

It is an arithmetic number, because the mean of its divisors is an integer number (10535833).

Almost surely, 2^42116761 is an apocalyptic number.

It is an amenable number.

42116761 is a deficient number, since it is larger than the sum of its proper divisors (26571).

42116761 is a wasteful number, since it uses less digits than its factorization.

42116761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26570.

The product of its digits is 2016, while the sum is 28.

The square root of 42116761 is about 6489.7427529911. The cubic root of 42116761 is about 347.9244810146.

Adding to 42116761 its reverse (16761124), we get a palindrome (58877885).

The spelling of 42116761 in words is "forty-two million, one hundred sixteen thousand, seven hundred sixty-one".