42736457 has 2 divisors, whose sum is σ = 42736458. Its totient is φ = 42736456.

The previous prime is 42736427. The next prime is 42736483. The reversal of 42736457 is 75463724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42719296 + 17161 = 6536^2 + 131^2 .

It is a cyclic number.

It is not a de Polignac number, because 42736457 - 2⁸ = 42736201 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42736457.

It is not a weakly prime, because it can be changed into another prime (42736427) 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, 21368228 + 21368229.

It is an arithmetic number, because the mean of its divisors is an integer number (21368229).

Almost surely, 2^42736457 is an apocalyptic number.

It is an amenable number.

42736457 is a deficient number, since it is larger than the sum of its proper divisors (1).

42736457 is an equidigital number, since it uses as much as digits as its factorization.

42736457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 38.

The square root of 42736457 is about 6537.3126741804. The cubic root of 42736457 is about 349.6226054579.

The spelling of 42736457 in words is "forty-two million, seven hundred thirty-six thousand, four hundred fifty-seven".