42406757 has 2 divisors, whose sum is σ = 42406758. Its totient is φ = 42406756.

The previous prime is 42406747. The next prime is 42406783. The reversal of 42406757 is 75760424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36409156 + 5997601 = 6034^2 + 2449^2 .

It is a cyclic number.

It is not a de Polignac number, because 42406757 - 2⁸ = 42406501 is a prime.

It is a Chen prime.

It is equal to p_2570849 and since 42406757 and 2570849 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42406747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21203378 + 21203379.

It is an arithmetic number, because the mean of its divisors is an integer number (21203379).

Almost surely, 2^42406757 is an apocalyptic number.

It is an amenable number.

42406757 is a deficient number, since it is larger than the sum of its proper divisors (1).

42406757 is an equidigital number, since it uses as much as digits as its factorization.

42406757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 42406757 is about 6512.0470667832. The cubic root of 42406757 is about 348.7212027283.

The spelling of 42406757 in words is "forty-two million, four hundred six thousand, seven hundred fifty-seven".