42008761 has 2 divisors, whose sum is σ = 42008762. Its totient is φ = 42008760.

The previous prime is 42008749. The next prime is 42008773. The reversal of 42008761 is 16780024.

It is a balanced prime because it is at equal distance from previous prime (42008749) and next prime (42008773).

It can be written as a sum of positive squares in only one way, i.e., 26327161 + 15681600 = 5131^2 + 3960^2 .

It is a cyclic number.

It is not a de Polignac number, because 42008761 - 2⁹ = 42008249 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42008261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21004380 + 21004381.

It is an arithmetic number, because the mean of its divisors is an integer number (21004381).

Almost surely, 2^42008761 is an apocalyptic number.

It is an amenable number.

42008761 is a deficient number, since it is larger than the sum of its proper divisors (1).

42008761 is an equidigital number, since it uses as much as digits as its factorization.

42008761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 42008761 is about 6481.4165889873. The cubic root of 42008761 is about 347.6268322285.

Adding to 42008761 its reverse (16780024), we get a palindrome (58788785).

The spelling of 42008761 in words is "forty-two million, eight thousand, seven hundred sixty-one".