42515797 has 2 divisors, whose sum is σ = 42515798. Its totient is φ = 42515796.

The previous prime is 42515789. The next prime is 42515801. The reversal of 42515797 is 79751524.

42515797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36493681 + 6022116 = 6041^2 + 2454^2 .

It is a cyclic number.

It is not a de Polignac number, because 42515797 - 2³ = 42515789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42515717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21257898 + 21257899.

It is an arithmetic number, because the mean of its divisors is an integer number (21257899).

Almost surely, 2^42515797 is an apocalyptic number.

It is an amenable number.

42515797 is a deficient number, since it is larger than the sum of its proper divisors (1).

42515797 is an equidigital number, since it uses as much as digits as its factorization.

42515797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 88200, while the sum is 40.

The square root of 42515797 is about 6520.4138672327. The cubic root of 42515797 is about 349.0198345063.

The spelling of 42515797 in words is "forty-two million, five hundred fifteen thousand, seven hundred ninety-seven".