42540763 has 2 divisors, whose sum is σ = 42540764. Its totient is φ = 42540762.

The previous prime is 42540761. The next prime is 42540793. The reversal of 42540763 is 36704524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42540763 - 2¹ = 42540761 is a prime.

Together with 42540761, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42540761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21270381 + 21270382.

It is an arithmetic number, because the mean of its divisors is an integer number (21270382).

Almost surely, 2^42540763 is an apocalyptic number.

42540763 is a deficient number, since it is larger than the sum of its proper divisors (1).

42540763 is an equidigital number, since it uses as much as digits as its factorization.

42540763 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 42540763 is about 6522.3280352954. The cubic root of 42540763 is about 349.0881379351.

The spelling of 42540763 in words is "forty-two million, five hundred forty thousand, seven hundred sixty-three".