42115757 has 2 divisors, whose sum is σ = 42115758. Its totient is φ = 42115756.

The previous prime is 42115753. The next prime is 42115771. The reversal of 42115757 is 75751124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32959081 + 9156676 = 5741^2 + 3026^2 .

It is a cyclic number.

It is not a de Polignac number, because 42115757 - 2² = 42115753 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42115753) 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 as a sum of consecutive naturals, namely, 21057878 + 21057879.

It is an arithmetic number, because the mean of its divisors is an integer number (21057879).

Almost surely, 2^42115757 is an apocalyptic number.

It is an amenable number.

42115757 is a deficient number, since it is larger than the sum of its proper divisors (1).

42115757 is an equidigital number, since it uses as much as digits as its factorization.

42115757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9800, while the sum is 32.

The square root of 42115757 is about 6489.6653996951. The cubic root of 42115757 is about 347.9217163278.

The spelling of 42115757 in words is "forty-two million, one hundred fifteen thousand, seven hundred fifty-seven".