42750731 has 2 divisors, whose sum is σ = 42750732. Its totient is φ = 42750730.

The previous prime is 42750709. The next prime is 42750737. The reversal of 42750731 is 13705724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42750731 - 2¹⁴ = 42734347 is a prime.

It is a super-2 number, since 2×42750731² = 3655250002068722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42750694 and 42750703.

It is not a weakly prime, because it can be changed into another prime (42750737) 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, 21375365 + 21375366.

It is an arithmetic number, because the mean of its divisors is an integer number (21375366).

Almost surely, 2^42750731 is an apocalyptic number.

42750731 is a deficient number, since it is larger than the sum of its proper divisors (1).

42750731 is an equidigital number, since it uses as much as digits as its factorization.

42750731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 42750731 is about 6538.4043160392. The cubic root of 42750731 is about 349.6615258389.

The spelling of 42750731 in words is "forty-two million, seven hundred fifty thousand, seven hundred thirty-one".