42312757 has 2 divisors, whose sum is σ = 42312758. Its totient is φ = 42312756.

The previous prime is 42312749. The next prime is 42312763. The reversal of 42312757 is 75721324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24216241 + 18096516 = 4921^2 + 4254^2 .

It is a cyclic number.

It is not a de Polignac number, because 42312757 - 2³ = 42312749 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42312857) 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, 21156378 + 21156379.

It is an arithmetic number, because the mean of its divisors is an integer number (21156379).

Almost surely, 2^42312757 is an apocalyptic number.

It is an amenable number.

42312757 is a deficient number, since it is larger than the sum of its proper divisors (1).

42312757 is an equidigital number, since it uses as much as digits as its factorization.

42312757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 31.

The square root of 42312757 is about 6504.8256702236. The cubic root of 42312757 is about 348.4633503997.

The spelling of 42312757 in words is "forty-two million, three hundred twelve thousand, seven hundred fifty-seven".