42840751 has 2 divisors, whose sum is σ = 42840752. Its totient is φ = 42840750.

The previous prime is 42840739. The next prime is 42840757. The reversal of 42840751 is 15704824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42840751 - 2⁵ = 42840719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42840757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21420375 + 21420376.

It is an arithmetic number, because the mean of its divisors is an integer number (21420376).

Almost surely, 2^42840751 is an apocalyptic number.

42840751 is a deficient number, since it is larger than the sum of its proper divisors (1).

42840751 is an equidigital number, since it uses as much as digits as its factorization.

42840751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 42840751 is about 6545.2846385776. The cubic root of 42840751 is about 349.9067806162.

The spelling of 42840751 in words is "forty-two million, eight hundred forty thousand, seven hundred fifty-one".